a) Heat is transferred from where to where? b) Which principle do we learn about from this process? c) How will you state the principle briefly?

Question

Read the following paragraph and answer the questions.

If heat is exchanged between a hot and cold object, the temperature of the cold object goes on increasing due to gain of energy and the temperature of the hot object goes on decreasing due to loss of energy.

The change in temperature continues till the temperatures of both the objects attain the same value. In this process, the cold object gains heat energy and the hot object loses heat energy. If the system of both the objects is isolated from the environment by keeping it inside a heat resistant box, then no energy can flow from inside the box or come into the box.

a) Heat is transferred from where to where?

b) Which principle do we learn about from this process?

c) How will you state the principle briefly?

d) Which property of the substance is measured using this principle?

Answer 1

a) Heat is transferred from hot object to cold object.

b) This process shows the principle of heat exchange.

c) In this process, the cold object gains heat energy and the hot object loses heat energy.

If the system of both the objects is isolated from the environment, Heat energy lost by the hot object = Heat energy gained by the cold object. This is called the principle of ‘Heat Exchange’.

d) The specific heat of the substance is measured by using this principle.