Question

Calorie is defined as the amount of heat required to raise temperature of $1g$ of water by $1^{\circ }C$ and it is defined under which of the following conditions?

• A. From ${14.5}^{\circ }C$ to ${15.5}^{\circ }C$ at $760mm$ of $Hg$
• B. From ${98.5}^{\circ }C$ to ${99.5}^{\circ }C$ at $760mm$ of $Hg$
• C. From ${13.5}^{\circ }C$ to ${14.5}^{\circ }C$ at $76mm$ of $Hg$
• D. From ${3.5}^{\circ }C$ to ${4.5}^{\circ }C$ at $76mm$ of $Hg$

Answer 1

The correct option is A From ${14.5}^{\circ }C$ to ${15.5}^{\circ }C$ at $760mm$ of $Hg$

One calorie is the heat required to raise the temperature of $1g$ of water from ${14.5}^{\circ }C$ to ${15.5}^{\circ }C$ at $760mm$ of $Hg$.