Heat and work are equivalent. This means
Correct answer: C. The temperature of a body can be increased by doing work on it
- A. When we supply heat to a body we do work on it
- B. When we do work on a body we supply heat to it
- C. The temperature of a body can be increased by doing work on it
- D. Heat and work are not inter convertible
Explanation
From the given statement it can be derived Q= W and hence Internal energy change must me zero. (Following from first law of thermodynamics Q= W + U) the temperature of a body can be increased by doing work on it. When work is done on a body, it can lead to an increase in the body's internal energy, which, in turn, can result in a rise in its temperature.Work done on a body involves transferring energy to the body through mechanical means. This energy is converted into the body's internal energy, which is the sum of the kinetic energy and potential energy of its particles. As the internal energy increases, the average kinetic energy of the particles also increases, leading to a rise in temperature.One common example is compressing a gas in a container. When you compress a gas, you are doing work on it by reducing its volume against an external force. The work done on the gas increases its internal energy, and since temperature is a measure of the average kinetic energy of the gas particles, the temperature of the gas increases as well.It's important to note that the increase in temperature due to work done on the body is a result of the transfer of energy and is not a direct heating process like supplying heat through a temperature difference. Nonetheless, work done on a body can indeed raise its temperature by increasing its internal energy.
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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