A solar cooker and a pressure cooker both are used to cook food. Treat

1.	A solar cooker and a pressure cooker both are used to cook food. Treating them as thermodynamic systems, discuss the similarities and differences between them.
Answer» Similarities : 1. Heat is added to the system. 2. There is increase in the internal energy of the system. 3. Work is done by the system on its environment. Differences : In a solar cooker, heat is supplied in the form of solar radiation. The rate of supply of heat is relatively low. In a pressure cooker, usually LPG is used (burned) to provide heat. The rate of supply of heat v is relatively high. As a result, it takes very long time for cooking when a solar cooker is used. With a pressure cooker, it does not take very long time for cooking. [Note : A solar cooker can be used only when enough solar radiation is available.]

A solar cooker and a pressure cooker both are used to cook food. Treating them as thermodynamic systems, discuss the similarities and differences between them.

Answer»

Similarities :

1. Heat is added to the system.

2. There is increase in the internal energy of the system.

3. Work is done by the system on its environment.

Differences : In a solar cooker, heat is supplied in the form of solar radiation. The rate of supply of heat is relatively low.

In a pressure cooker, usually LPG is used (burned) to provide heat. The rate of supply of heat v is relatively high.

As a result, it takes very long time for cooking when a solar cooker is used. With a pressure cooker, it does not take very long time for cooking.

[Note : A solar cooker can be used only when enough solar radiation is available.]

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