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Class XI Chemistry Thermodynamics Quiz 1

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Question 1

When a solid melts there will be

Question 2

At 320 K, a gas A₂ is 20% dissociated to A(g). The standard free energy change at 320 K and 1 atm in J mol⁻¹ is approximately : (R=8.314 JK⁻¹ mol⁻¹; ln 2=0.693; ln 3=1.098)

Question 3

The heat of combustion of graphite and carbon monoxide respectively are – 393.5 KJ/mol and – 283 kJ/mol. Thus the heat of formation of carbon monoxide in kJ/mol is ____

Question 4

For which of the following processes, ΔS is negative ?

Question 5

An ideal gas undergoes a cyclic process as shown in Figure.

Heat absorbed by the system during process CA is :

Question 6

Calculate total entropy change for the transition of 1 mole of solid sulphur from its monoclinic form to the rhombic form at 400 K, if ∆H = – 400 J/mole for this transition and assume the surrounding to be in a bath of water at 27^oC

Question 7

Any process will be spontaneous at constant pressure and temperature when

Question 8

For the reaction:

∆U=2.1kcal ∆S=20cal/K at 300K, ∆G is

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May 12JEE & BITSAT