A physicist converted 2kg of water at 37 degrees Celsius to steam at 100 degrees Celsius.

Question

Assuming no heat is lost, calculate the amount of energy needed
(i) to heat the water at 100 degrees
(ii) to heat the water from 100 degrees Celsius to steam at 100 degrees Celsius
(iii) to completely convert the water from 37 degrees Celsius to steam at 100 degrees Celsius