Question

1. A sample of water with a mass of 23.0 grams at a temperature of -46.0°C increases to 40°C.

a) Make a phase change diagram to indicate the changes water will undergo in this problem & label each step.

b) How much total heat (Joules) is needed to do the problem above?

Answer 1

a)

b)

Specific heat capacity of Ice $=2.093J/g/K$

Specific heat capacity of water $=4.184J/g/K$

Latent heat of fusion of Ice $=334J/g$

Total heat $=23[2.093×46+334+4.184×40]$

$=1.375×10^4J$