[scienceloverr]

Calculate the amount of heat in kilojoules released when 50 grams of steam at 125 degree Celsius are converted to 50 grams of ice at -125 degree C.

[Donaldson Tan]

Here's some hint

1. Assume this is carried out at 1atm
2. Find out the heat capacity of ice, steam and water
3. Find out the heat of fusion and heat of vapourisation of water
4. The process can be considered as the following:
Steam 125C -> Steam at 100C -> Water at 100C -> Water at 0C -> Ice at 0C -> Ice at -125C