multiple select
Select all of the items that are true about a sample of water vapor at 101°C as it cools.
1) Its temperature will fall continuously until it condensed into a liquid.
2) Its temperature will fall steadily until reaching 100°C.
3) The molecules of water gain potential energy.
4) Its temperature will remain at 100°C until all the vapor condenses.
1 is true. 2 is not true at all pressures.
3. is patently false
4. is not true at all pressures. ever been on a mountain top?
thank you. and no i haven't.
The correct answers are:
3) The molecules of water gain potential energy.
4) Its temperature will remain at 100°C until all the vapor condenses.
Explanation:
1) This statement is not true. The temperature of the water vapor will not continuously fall until it condenses into a liquid. It will reach a certain temperature (100°C) and then remain constant until the vapor condenses.
2) This statement is not true. The temperature will not fall steadily until reaching 100°C. Instead, it will heat up until it reaches 100°C and then remain constant.
3) This statement is true. As the water vapor cools, the molecules will gain potential energy due to the decrease in temperature.
4) This statement is true. Once the water vapor reaches 100°C, the temperature will remain constant until all the vapor has condensed into a liquid.
To determine which of the statements are true about a sample of water vapor at 101°C as it cools, we can analyze each statement.
1) Its temperature will fall continuously until it condenses into a liquid.
This statement is true. As water vapor cools, its temperature decreases until it reaches the condensation point, where it transforms into a liquid state.
2) Its temperature will fall steadily until reaching 100°C.
This statement is partially true. As water vapor cools, its temperature does decrease steadily. However, it doesn't necessarily stop at 100°C. The temperature can continue to drop below 100°C until it reaches the condensation point.
3) The molecules of water gain potential energy.
This statement is false. As water vapor cools, the molecules lose energy rather than gaining it. Cooling causes the molecules to slow down and move closer together, leading to the transition from a gaseous state to a liquid state.
4) Its temperature will remain at 100°C until all the vapor condenses.
This statement is false. The temperature of water vapor will generally decrease steadily as it cools. It's only at the exact condensation point that the temperature will remain constant until all the vapor has fully condensed.
Based on this analysis, the correct statements are:
- Its temperature will fall continuously until it condenses into a liquid.
- Its temperature will fall steadily until reaching the condensation point.
Therefore, the correct options are 1) and 2).