How many calories are required to raise the temperature of 225 g of water from 42°C to 75°C?

1 Answer
May 8, 2016

Answer:

Approx. #30*kJ#.

Explanation:

The specific heat capacity of water is #4.12*J*K^-1*g^-1#. This value should have been quoted with the question.

We want the energy required for the transition of the given mass of water at #42# #""^@C# to water at #75# #""^@C#. #DeltaT# #=# #33# #""^@C# or #33# #K#.

Thus #225*cancelgxx4.12*J*cancel(K^-1)*cancel(g^-1)xx33*cancelK# #=# #??*kJ#