The number of calories needed to raise the temperature of 32 g of water from 12 °C to 54 °C is
A) 0.76 cal.
B) 1300 cal.
C) 1700 cal.
D) 384 cal.
E) 1.3 cal.

Question

The number of calories needed to raise the temperature of 32 g of water from 12 °C to 54 °C is 
A) 0.76 cal. 
B) 1300 cal. 
C) 1700 cal. 
D) 384 cal. 
E) 1.3 cal.

Quizplus · Accepted Answer

The specific heat capacity of water is 1 cal/g°C. The temperature change is 54°C - 12°C = 42°C. Therefore, the energy required is 32 g * 42°C * 1 cal/g°C = 1344 cal, which is closest to 1300 cal.

The Number of Calories Needed to Raise the Temperature of 32