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Question
Give an example of some familiar process in which no heat is added to or removed from a system, but the temperature of the system changes.
Solution
- Hot water in a container cools after some time. Its temperature goes on decreasing with time, and after some time, it attains room temperature.
- Adiabatic compression is the process in which no heat is transferred to or from the system but the temperature of the system changes. When we compress gas in an adiabatic process, the volume of the gas will decrease, and the temperature of the gas rises as it is compressed, which we have seen the warming of a bicycle pump. Conversely, the temperature falls when the gas expands but the heat remains constant throughout the process.
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