The initial temperature of the water in a constant-pressure calorimeter is 14°C. A reaction takes place in the calorimeter, and the temperature rises
to 87°C. The calorimeter contains 254 g of water, which has a specific heat
of 4.18 J/(g.°C). Calculate the enthalpy change during this reaction. *

The enthalpy change during this reaction is 77505.56 J.

Explanation:

Given: ,        

Mass = 254 g,       Specific heat =

Formula used to calculate the enthalpy change is as follows.

where,

q = enthalpy change

m = mass of substance

C = specific heat capacity

= initial temperature

= final temperature

Substitute the values into above formula as follows.

Thus, we can conclude that the enthalpy change during this reaction is 77505.56 J.

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