To make ice, water must first be cooled. The specific heat of water is 4,186 J/kg · °C. Approximately how much heat must be removed from 0.50 kg of water to change its temperature from 24°C to 5°C? *

0 J
19,900 J
39,800 J
79,500 J

Jessica places 1000 g of water at 20.0°C in an insulated cup. The specific heat capacity of water is 4.20 J/g · °C. What is the final temperature of the water if 5000 J of energy is added to the water in the insulated cup? *

20.1°C
20.5°C
21.2°C
25.0°C

Two blocks of zinc with different masses are at room temperature. Each block then absorbs the same amount of heat over 10 minutes. When the temperature of each block is then measured, block 1 is at a higher temperature than block 2. Which of the following statements most likely describes the zinc blocks? *

The mass of block 1 is less than the mass of block 2.
The mass of block 1 is greater than the mass of block 2.
The specific heat of block 1 is less than the specific heat of block 2.
The specific heat of block 1 is greater than the specific heat of block 2.