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 Posted: Thu Mar 08, 2007 11:06 pm
This came up in an unrelated topic in ED, but I decided to get some better answers.
Are ice and steam still water, is water just a liquid?
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Posted: Fri Mar 09, 2007 10:30 am
It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom.
Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water.
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Posted: Fri Mar 09, 2007 11:59 am
Scare Tactic Propaganda It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom. Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water.
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Posted: Fri Mar 09, 2007 4:14 pm
writercxvii Scare Tactic Propaganda It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom. Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water. Those people are right and wrong. They aren't the same until you go down to the molecular level. They have different physical and (I think) chemical properties in the different phases. But the molecules are still the same.
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Posted: Fri Mar 09, 2007 5:43 pm
Scare Tactic Propaganda writercxvii Scare Tactic Propaganda It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom. Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water. Those people are right and wrong. They aren't the same until you go down to the molecular level. They have different physical and (I think) chemical properties in the different phases. But the molecules are still the same.
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Posted: Fri Mar 09, 2007 10:50 pm
writercxvii Scare Tactic Propaganda writercxvii Scare Tactic Propaganda It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom. Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water. Those people are right and wrong. They aren't the same until you go down to the molecular level. They have different physical and (I think) chemical properties in the different phases. But the molecules are still the same. Jackpot. Although ice is quite a unique comment. It melts under pressure, even at temperatures below 273 Kelvin.
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Posted: Sat Mar 10, 2007 12:42 am
Cougar Draven writercxvii Scare Tactic Propaganda writercxvii Scare Tactic Propaganda It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom. Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water. Those people are right and wrong. They aren't the same until you go down to the molecular level. They have different physical and (I think) chemical properties in the different phases. But the molecules are still the same. Jackpot. Although ice is quite a unique comment. It melts under pressure, even at temperatures below 273 Kelvin.
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Posted: Sat Mar 10, 2007 4:02 am
writercxvii Cougar Draven writercxvii Scare Tactic Propaganda writercxvii Scare Tactic Propaganda It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom. Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water. Those people are right and wrong. They aren't the same until you go down to the molecular level. They have different physical and (I think) chemical properties in the different phases. But the molecules are still the same. Jackpot. Although ice is quite a unique comment. It melts under pressure, even at temperatures below 273 Kelvin. I always thought so.
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Posted: Sat Mar 10, 2007 7:27 pm
writercxvii Scare Tactic Propaganda writercxvii Scare Tactic Propaganda It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom. Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water. Those people are right and wrong. They aren't the same until you go down to the molecular level. They have different physical and (I think) chemical properties in the different phases. But the molecules are still the same. Oh sweatdrop EDIT: Wait, from my chem book: Chemistry, Matter and Change, FL Edition, Glencoe Science Observations of properties may vary depending on the conditions of the immediate envoronment. It is importantto state the specific conditions in which observations are made because chemical and physical properties depend on pressure and temperature. Consider the properties of water, for example. You may think of water as a liquid (physical property) that is not particularly chemically reactive (chemical property). You may also know that water has a density of 1.00 g/cm^3 (physical property). These properties, however, apply only to water at standard "room" temperature and pressure. At temperatures greater than 100C, water is a gas (physical property) with a density of about .0006 g/cm^3 (physical property) that reacts rapidly with many different substances (chemical property). as you can see, the properties of water are dramativally different under different conditions. Emphasis by me.
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Posted: Sun Mar 11, 2007 1:16 pm
Scare Tactic Propaganda writercxvii Scare Tactic Propaganda writercxvii Scare Tactic Propaganda It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom. Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water. Those people are right and wrong. They aren't the same until you go down to the molecular level. They have different physical and (I think) chemical properties in the different phases. But the molecules are still the same. Oh sweatdrop EDIT: Wait, from my chem book: Chemistry, Matter and Change, FL Edition, Glencoe Science Observations of properties may vary depending on the conditions of the immediate envoronment. It is importantto state the specific conditions in which observations are made because chemical and physical properties depend on pressure and temperature. Consider the properties of water, for example. You may think of water as a liquid (physical property) that is not particularly chemically reactive (chemical property). You may also know that water has a density of 1.00 g/cm^3 (physical property). These properties, however, apply only to water at standard "room" temperature and pressure. At temperatures greater than 100C, water is a gas (physical property) with a density of about .0006 g/cm^3 (physical property) that reacts rapidly with many different substances (chemical property). as you can see, the properties of water are dramativally different under different conditions. Emphasis by me.
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Posted: Mon Mar 12, 2007 4:02 am
writercxvii Scare Tactic Propaganda writercxvii Scare Tactic Propaganda writercxvii Thanks. While I'm aware of this, the arguement was being made that if we call them different things, then they aren't the same. Tehy didn't grasp that water was just the common name of the chemical dihydrogenmonoxide. Those people are right and wrong. They aren't the same until you go down to the molecular level. They have different physical and (I think) chemical properties in the different phases. But the molecules are still the same. Oh sweatdrop EDIT: Wait, from my chem book: Chemistry, Matter and Change, FL Edition, Glencoe Science Observations of properties may vary depending on the conditions of the immediate envoronment. It is importantto state the specific conditions in which observations are made because chemical and physical properties depend on pressure and temperature. Consider the properties of water, for example. You may think of water as a liquid (physical property) that is not particularly chemically reactive (chemical property). You may also know that water has a density of 1.00 g/cm^3 (physical property). These properties, however, apply only to water at standard "room" temperature and pressure. At temperatures greater than 100C, water is a gas (physical property) with a density of about .0006 g/cm^3 (physical property) that reacts rapidly with many different substances (chemical property). as you can see, the properties of water are dramativally different under different conditions. Emphasis by me. Reactivity is a chemical property, and either they're identical or they aren't.
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Posted: Wed Mar 28, 2007 11:43 am
Cougar Draven writercxvii Scare Tactic Propaganda writercxvii Scare Tactic Propaganda It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom. Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water. Those people are right and wrong. They aren't the same until you go down to the molecular level. They have different physical and (I think) chemical properties in the different phases. But the molecules are still the same. Jackpot. Although ice is quite a unique comment. It melts under pressure, even at temperatures below 273 Kelvin. Whoops I misread the post. gonk
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Posted: Wed Mar 28, 2007 6:05 pm
Deo_Machina Cougar Draven writercxvii Scare Tactic Propaganda writercxvii Scare Tactic Propaganda It's still water. Water is a chemical with the formula H2O. In the forms of gas and solid the molecules still contain 2 Hydrogen atoms and 1 Oxygen atom. Chemicals do not change at the molecular/atomic level after a phase change, so ice and steam is still water. Those people are right and wrong. They aren't the same until you go down to the molecular level. They have different physical and (I think) chemical properties in the different phases. But the molecules are still the same. Jackpot. Although ice is quite a unique comment. It melts under pressure, even at temperatures below 273 Kelvin. Whoops I misread the post. gonk It's cool. 273 K is about 0 C.
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