Question

The temperature range in the definition of calorie is:
A. ${14.5^\circ }C\,to\,{15.5^\circ }C$
B. ${15.5^\circ }C\,to\,{16.5^\circ }C$
C. ${1^\circ }C\,to\,{2^\circ }C$
D. ${13.5^\circ }C\,to\,{14.5^\circ }C$

Answer 1

Hint : In order to the question, to know the temperature range in the definition of calorie, we should go through the concept of International Committee of pure physics in which the discussion of the temperature range of calorie.

Complete Step By Step Answer:
According to the International Committee of pure physics, calorie is the standard unit to measure heat. The quantity of heat required to raise 1gram of water from ${14.5^\circ }C\,to\,{15.5^\circ }C$ is defined as a calorie.
Calorie, a unit of energy or heat variously defined. The calorie was originally defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of $1\;gram$ of water ${1^\circ }C$ . Since 1925 this calorie has been characterized as far as the joule, the definition since 1948 being that one calorie is equivalent to around $4.2{\text{ }}joules$ . Since the amount of warmth addressed by the calorie is known to vary at various temperatures (by as much as $1\%$ ), it has therefore been important to characterize the temperature at which the particular warmth of water is to be taken as $1{\text{ }}calorie$ . Subsequently the " $15^\circ {\text{ }}calorie$ " (additionally called the $gram - calorie$ , or little calorie) was characterized as the measure of warmth that will raise the temperature of $1\;gram$ of water from ${14.5^\circ }C\,to\,{15.5^\circ }C$ —equivalent to $4.1855{\text{ }}joules$ .
Hence, the correct option is (A.) ${14.5^\circ }C\,to\,{15.5^\circ }C$ .

Note :
Another calorie, a unit of heat energy, is the International Table calorie (IT calorie), originally defined as $\dfrac{1}{{860}}$ international watt-hour. It is equal to 4.1868 joules and is used in engineering steam tables. A unit of heat energy used in thermochemistry is the thermochemical calorie, equal to $4.184{\text{ }}joules$ . It is commonly used as the unit for heat capacities, latent heats, and heats of reaction.