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Correct expression of enthalpy of combustion is

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Important Questions on Thermodynamics

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Select the pair of intensive properties
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If calorific fuel value of C2H6 is xkJ/g then the heat of combustion of C2H6 (in kJ/mol )is
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Work done is always zero for
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When an ideal gas is compressed adiabatically and reversibly, the final temperature is:
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A closed flask contains a substance in all its three states, solids, liquids and vapour at its triple point. In this situation the average KE of the water molecule will be
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In thermodynamics, a process is called reversible when.
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16 kg oxygen gas expands at STP 1 atm isobarically to occupy double of its original volume. The work done during the process is nearly
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1 mole of a non-ideal gas undergoes a change of state 2.0 atm, 3.0 L, 95 K  4.0 atm, 5.0 L, 245 K, when a change in internal energy, U=30.0 L-atm. The change in enthalpy H of the process in L-atm is