Question

Calorie is defined as the amount of heat required to raise the temperature of $1 \,g$ 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 $760\, mm$ of $Hg$
• B. From $98.5^{\circ} C$ to $99.5^{\circ} C$ at $760\, mm$ of $Hg$
• C. From $13.5^{\circ} C$ to $14.5^{\circ} C$ at $76\, mm$ of $Hg$
• D. From $3.5^{\circ} C$ to $4.5^{\circ} C$ at $76\, mm$ of $Hg$

Answer 1

Answer: (A)

$1$ calorie is the amount of heat required to raise the temperature of $1 \,g$ of water from $14.5^{\circ} C$ to $15.5^{\circ} C$ at $760\, mm$ of $Hg$. Hence correct option is (a).