Question

Calculate the change in internal energy of 2kg of water at 90 degree Celsius when it is changed to
3:30m3
of steam at
100oC
. The whole process occurs at atmospheric pressure. The latent heat of vaporization of water is
2:26×106J=kg
.
a. 4.27 MJ
b. 3.43 kJ
c. 45.72 mJ
d. 543.63 J