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Class XI Chemistry Thermodynamics Quiz 3

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Question 1

A gas consisting of rigid diatomic molecules was expanded in a polytropic process so that the rate of collisions of the molecules against the vessels wall did not change. The molar heat capacity of the gas in cal/k-mol in this process is :

Question 2

Three moles on an ideal gas (Cp=2.5R) and 2 moles of another ideal gas (Cp=3.5R) are taken in a vessel and compressed reversibly and adiabatically. In this process the temperature of gaseous mixture increased from 300K to 400K. The increase in internal energy of gaseous mixture in cal is ….

Question 3

If heat content of X is smaller than that of Y then the process X → Y is ____

Question 4

The enthalpy change involved in the oxidation of glucose is – 2880kJ/mol. 25% of this energy is available for muscular work. If 100 kJ of muscular work is needed to walk 1 km . what is the max distance a person will be able to walk after eating 120g of glucose….

Question 5

A reaction has ∆H = - 33 kJ and ∆S = -58 KJ. This reaction would be :

Question 6

A reaction is non-spontaneous at the freezing point of water but is spontaneous at the boiling point of water then ΔH and ΔS should be

Question 7

A gas undergoes change from state A to state B. In this process, the heat absorbed and work done by the gas is 5 J and 8 J, respectively. Now gas is brought back to A by another process during which 3 J of heat is evolved. In this reverse process of B to A:

Question 8

A gas expands isothemally and reversibily. The Work Done by the gas is-

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