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6. For an ideal gas, PV=210.3, where =Cp/Cv. After a reversible adiabatic process, the pressure of system reduces from 20atm to 4atm. The work is

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6. For an ideal gas, PV=210.3, where =Cp/Cv. After a reversible adiabatic process, the pressure of system reduces from 20atm to 4atm. The work is _ L atm. (A) 28.6 (B) 37.1 (C) 49.5 (D) 58.5 (E) 68.9 7. The normal boiling temperature of iron is 3330K. The rate of change of the vapor pressure of liquid iron with temperature is 3.72103atm/K. The molar latent heat of boiling of iron at 3330K is (A) 3423764 (B) 342376.4 (C) 34237.64 (D) 3423.764 (E) 342.3764 8. Gas constant is NOT (A) 8.314JK1mol1 (B) 8.63105eVK1mol1 (C) 5.191019eVK1mol1 (D) 1.987calK1mol1 (E) 0.082LatmK1mol1

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