Question

Select the correct Answers.

What happens when carbon dloxide at 74 C is placed in thermal contact with water at 14°C?


1. Energy leaves the carbon dioxide and enters the water

2. The water gets hotter than the carbon dioxide.

3. The temperatures of the two substances equalize.

4. Both the water and the carbon dioxide decrease in temperature

5. The water stays colder than the carbon dioxide.

Answer 1

3. The temperatures of the two substances equalize.

Step-by-step explanation:

• As two objects at different temperatures are placed in contact, heat is transferred from the warmer to the cooler object until the temperature of the two objects be the same.

• The amount of heat that is transferred from the warmer object is equal to the amount of heat that is transferred into the cooler object.

• This is in agreement with the law of conservation of energy.
• So, the right choice is: 3. The temperatures of the two substances equalize.

Answer 2

A and C

Step-by-step explanation:

All temperatures end up the same if placed next to the other, and the heat is going out of the carbon dioxide into the water.