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11th Class Physics Thermodynamical Processes Question Bank Thermodynamics Conceptual Problems

  • question_answer
    The temperature of a gas rises during an adiabatic compression, although no heat is given to the gas from outside. Why?

    Answer:

                    By   first   law   of   thermodynamics, \[\Delta Q\]\[=\Delta U+\Delta W.\]For an adiabatic compression, \[\Delta Q=0,\]so \[\Delta U=-\Delta W.\]That is work is done on the gas which increases its internal energy. Hence temperature of the gas rises.


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