Question

One calorie is the heat energy required to raise the temperature of 1 g of water from _________.

• A. ${10}^{\circ }C$ to ${100}^{\circ }C$
• B. $1^{\circ }C$ to ${10}^{\circ }C$
• C. ${14.5}^{\circ }C$ to ${15.5}^{\circ }C$
• D. any initial to any final temperature

Answer 1

The correct option is C

${14.5}^{\circ }C$ to ${15.5}^{\circ }C$

One calorie is the amount of heat required at a pressure of one atmosphere to raise the temperature of 1 g of water from ${14.5}^{\circ }C$ to ${15.5}^{\circ }C$ at standard pressure. However, the value is approximately the same for $1^{\circ }C$ rise at any temperature.