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JEE 2020 Chemistry : Thermodynamics Quiz-1 (12.07.2019)
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Question 1
A heat engine absorbs heat q1 from a source at temperature T1 and heat q2 from a source at temperature T2. Work done is found to be (q1+ q2). This is in accordance with:
Question 2
The molar heat capacity 
of 
is 10 cals at 1000 K. The change in entropy associated with cooling of 32 g of 
vapour from 1000 K to 100 K at constant pressure will be :
(D = deuterium, at. mass = 2 u)
of is 10 cals at 1000 K. The change in entropy associated with cooling of 32 g of vapour from 1000 K to 100 K at constant pressure will be : (D = deuterium, at. mass = 2 u)
Question 3
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 27oC
Question 4
10 mol of an ideal gas (Cp/Cv = 1.5) expands adiabatically from (400 K, 10 L) to 20 L along following paths.
Path A : Reversible
Path B : One step expansion.
Path C : Two step expansion.
Path D : Free expansion
Which is/are incorrect statement(s) ?
Path A : Reversible
Path B : One step expansion.
Path C : Two step expansion.
Path D : Free expansion
Which is/are incorrect statement(s) ?
Question 5
Select correct statement(s)
Question 6
For a reaction carried out at 27oC the ratio of equilibrium concentrations of product to reactant changes by a factor of e4 for every
Question 7
Suppose reaction has entropy change of ─50 J/K and enthalpy change of ─28 KJ. At what temperature, the reaction becomes non-spontaneous?
Question 8
The criterion for a spontaneous process is
Question 9
Which one of the following is not a unit of energy?
Question 10
For a reaction at 25°C, enthalpy change and entropy changes are -11.7*103 J mol-1 and -105 Jmol-1K-1 respectively. What is the Gibbs free energy?
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