1

AIEEE 2007

MCQ (Single Correct Answer)

+4

-1

Assuming that water vapour is an ideal gas, the internal energy change $$\left( {\Delta U} \right)$$ when $$1$$ mol of water is vapourised at $$1$$ bar pressure and $${100^ \circ }C$$ (Given : molar enthalpy of vapourisation of water at $$1$$ bar and $$373$$ $$K$$ $$ = 41\,kJ\,mo{l^{ - 1}}\,$$

and $$R = 8.3\,J\,mo{l^{ - 1}}\,{K^{ - 1}}$$ )

and $$R = 8.3\,J\,mo{l^{ - 1}}\,{K^{ - 1}}$$ )

2

AIEEE 2006

MCQ (Single Correct Answer)

+4

-1

An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If T

_{i}is the initial temperature and T_{f}is the final temperature, which of the following statements is correct?3

AIEEE 2006

MCQ (Single Correct Answer)

+4

-1

($$\Delta H - \Delta U$$) for the formation of carbon monoxide (CO) from its elements at 298 K is : (R = 8.314 J K

^{–1}mol^{–1})4

AIEEE 2006

MCQ (Single Correct Answer)

+4

-1

The standard enthalpy of formation $$\Delta _fH^o$$ at 298 K for methane, CH

_{4}(g), is –74.8 kJ mol^{–1}. The additional information required to determine the average energy for C – H bond formation would be :Questions Asked from Thermodynamics (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates No. of Questions

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