When heating 2 kg of ice from -40°C,2 kg of water from 20°C to 50°C,and 2 kg of steam from 100°C to 125°C,which requires the most energy?
A)the ice
B)the water
C)The steam,it's obvious since it is the hottest.
D)All three take the same amount.

Question

Quizplus · Accepted Answer

The amount of energy required to change the temperature of a substance is given by its specific heat capacity. Water has a higher specific heat capacity than ice or steam, meaning it requires more energy to heat up or cool down. Therefore, heating 2 kg of water from 20°C to 50°C requires the most energy out of the three options.

When Heating 2 Kg of Ice from -40°C,2 Kg of Water