Phase Change Lab Hypothesis
Phase Change Lab
Ha Min Noh
Ms. D
Chemistry
February 6, 2016
Question
How does time relate to the change in temperature of H2O as it changes phases from ice to water to gas?
Hypothesis
If the time which H2O stays on the hot plate increases, then the temperature of H2O will increase and the phases from ice to water to gas will change because the heat is a source of energy to change the physical states.
Background
Ice is a solid form of H2O and water is a liquid form of H2O. The gas form of H2O is water vapor. A solid has a definite volume and shape. It is not compressible and it can’t flow. A liquid has a definite volume and indefinite shape. It is not compressible but it can flow. A gas has an indefinite volume and shape. It is compressible and it can flow. The word, “Phase change” means a change in a matter’s physical state. Temperature is a measurement of the …show more content…
During first and second trial, the hot plate didn’t work well and there were 2 beakers on it, so the ice didn’t melt fast. Also, it was hard to reach 0°C in the beginning, so we had to put a lot of ice, which makes it harder to melt all the ice in 20 to 30 minutes. Moreover, the time which we had to record the data can be wrong because sometimes we missed the time and measured the temperature few seconds late.
Conclusion
The water didn’t melt and boil during our experiment. The temperature changed when there were more heat added to it and when it had to reach the heat of fusion or heat of vaporization. The temperature stayed the same when the temperature reached heat of fusion and heat of vaporization and had to change to another physical state. During a phase change, the temperature has to be increased in order to change the physical state and it stays the same for a while staying at a physical state. My hypothesis was not supported, because as the time increased sometimes the temperature decreased and the water didn’t melt or boil during the
Ha Min Noh
Ms. D
Chemistry
February 6, 2016
Question
How does time relate to the change in temperature of H2O as it changes phases from ice to water to gas?
Hypothesis
If the time which H2O stays on the hot plate increases, then the temperature of H2O will increase and the phases from ice to water to gas will change because the heat is a source of energy to change the physical states.
Background
Ice is a solid form of H2O and water is a liquid form of H2O. The gas form of H2O is water vapor. A solid has a definite volume and shape. It is not compressible and it can’t flow. A liquid has a definite volume and indefinite shape. It is not compressible but it can flow. A gas has an indefinite volume and shape. It is compressible and it can flow. The word, “Phase change” means a change in a matter’s physical state. Temperature is a measurement of the …show more content…
During first and second trial, the hot plate didn’t work well and there were 2 beakers on it, so the ice didn’t melt fast. Also, it was hard to reach 0°C in the beginning, so we had to put a lot of ice, which makes it harder to melt all the ice in 20 to 30 minutes. Moreover, the time which we had to record the data can be wrong because sometimes we missed the time and measured the temperature few seconds late.
Conclusion
The water didn’t melt and boil during our experiment. The temperature changed when there were more heat added to it and when it had to reach the heat of fusion or heat of vaporization. The temperature stayed the same when the temperature reached heat of fusion and heat of vaporization and had to change to another physical state. During a phase change, the temperature has to be increased in order to change the physical state and it stays the same for a while staying at a physical state. My hypothesis was not supported, because as the time increased sometimes the temperature decreased and the water didn’t melt or boil during the