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12th Maharashtra Board
IMPORTANT
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Write equation for bond enthalpy of Cl-Cl bond in Cl2 molecule ΔrH° for dissociation of Cl2 molecule is 242.7 kJ mol-1.

Important Questions on Chemical Thermodynamics

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12th Maharashtra Board
IMPORTANT

State whether ΔS is positive, negative or zero for the following reactions, 2H2(g)+O2(g)2H2O(l).

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12th Maharashtra Board
IMPORTANT

State whether ΔS is positive, negative or zero for the following reactions, CaCO3sCaOs+CO2g.

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12th Maharashtra Board
IMPORTANT
The correct thermodynamic conditions for the spontaneous reaction at all temperatures are
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12th Maharashtra Board
IMPORTANT
A gas is allowed to expand in a well insulated container against a constant external pressure of 2.5 bar from an initial volume of 2.5 L to a final volume of 4.5 L. The change in internal energy, ΔU of the gas will be
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12th Maharashtra Board
IMPORTANT
In which of the following, entropy of the system decreases?
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12th Maharashtra Board
IMPORTANT
The enthalpy of formation for all elements in their standard states is
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12th Maharashtra Board
IMPORTANT
Which of the following reactions is exothermic?
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12th Maharashtra Board
IMPORTANT
6.24 g of ethanol are vaporized by supplying 5.89 kJ of heat. Enthalpy of vaporization of ethanol will be