A kilocalorie of heat is required to raise the temperature of
A) 1 g of water from 14 °C to 15 °C.
B) 10 g of water by 10 °C.
C) 100 g of water by 100 °C.
D) 100 g of water by 10 °C.
E) 1 g of water by 10 °C.

Question

A kilocalorie of heat is required to raise the temperature of 
A) 1 g of water from 14 °C to 15 °C. 
B) 10 g of water by 10 °C. 
C) 100 g of water by 100 °C. 
D) 100 g of water by 10 °C. 
E) 1 g of water by 10 °C.

Quizplus · Accepted Answer

A kilocalorie (kcal) is defined as the amount of heat energy needed to raise the temperature of 1 kilogram of water by 1 degree Celsius. Since 1 kilogram is equal to 1000 grams, raising the temperature of 100 grams of water by 10 degrees Celsius requires 1/10 of a kilocalorie, which matches the definition of a kilocalorie when considering the mass and temperature change.

A Kilocalorie of Heat Is Required to Raise the Temperature