Question

one calorie is defined to be the amount of heat required to raise the temperature of 1 gram of water from 14.5 degree Celsius to 15.5 degree Celsius why this 14.5 degree Celsius and 15.5 duration to a specific what is the important of this​

Answer 1

no there is no importance like this.

but may this will the reason that at 4° to 20° c water has high surface tension and density