Calculate the energy of 1kg of concrete from 20⁰c to 30⁰c

9 kilojoules of energy are stored in a kilogram of concrete due to sensible heat.

Explanation:

In this exercise we need to determined the sensible heat store in a kilogram of concrete due to a change in temperature. Sensible heat (), measured in kilojoules, is defined by the following expression:

(1)

Where:

- Mass, measured in kilograms.

- Average specific heat of concrete, measured in kilojoules per kilogram-degree Celsius.

, - Initial and final temperatures of concrete, measured in degrees Celsius.

If we know that , , and , then the energy store in a kilogram of concrete is:

9 kilojoules of energy are stored in a kilogram of concrete due to sensible heat.