Calorie is defined as the amount of heat required to raise temperature of 1 g of water by `1^@C` abd it is defined under which of the following conditions?

Options

A. From `14.5^@C to 15.5^@C` at 760mm of Hg.
B. From `98.5^@C to 99.5^@C` at 760mm of Hg.
C. From `13.5^@C to 14.5^@C` at 76mm of Hg.
D. From `3.5^@C to 4.5^@C` at 76mm of Hg.

Answer

A

Explanation

(a) 1 Calorie is the amount of heat required to raise
temperature of 1gm of water from `14.5^@C to 15.5^@C` at
760mm of Hg.