10 question-answer on thermodynamics 1. When an ideal monatomic gas is heated at constant pressure, fraction of heat energy supplied which increases the internal energy of gas is: (a) 2/5 (b) 3/5 (c) 3/7 (d) ¾ Ans:( b) 2. A sample of gas expands from volume V1 to V2. The amount of work done by the gas is max. when the expansion is: (a) Isothermal (b) Adiabatic (c) Isochoric (d) Same in all the cases Ans: (a) 3. Calculate change in internal energy when 5 mole of hydrogen is heated to 20˚C from 10˚C, specific heat of hydrogen at constant pressure is 8 cal/mole ˚C. (a) 200 cals (b) 350 cals (c) 300 cal (d) 475 cals Ans: (c) 4. ...
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