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Exams
IIT JEE
Chemistry
Chemical thermodynamics
4
8 marks
Chemical thermodynamics
This chapter covers the laws of thermodynamics and their applications to chemical systems.
16 Topics
35h prep
2.7% subject weight
16 Topics
1
The second law of thermodynamics
2m
1/10
π Key Formula
Spontaneous processes, entropy increase.
2
Fundamentals of thermodynamics
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π Key Formula
System, surroundings, state functions.
3
System and surroundings
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π Key Formula
Open, closed, isolated.
4
Extensive and intensive properties
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π Key Formula
Depend on amount vs independent.
5
State functions
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π Key Formula
Path independent, e.g., U, H, G.
6
Types of processes
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Isothermal, adiabatic, isobaric, isochoric.
7
The first law of thermodynamics- Concept of work
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2/10
π Key Formula
ΞU = q + w (sign convention)
8
Heat internal energy and enthalpy
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π Key Formula
H = U + PV, ΞH = q_p
9
Heat capacity and molar heat capacity
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π Key Formula
C = q/ΞT, C_p - C_v = R for ideal gas.
10
Hessβs law of constant heat summation
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π Key Formula
ΞH_reaction = Ξ£ ΞH_products - Ξ£ ΞH_reactants
11
Enthalpies of bond dissociation, combustion, formation
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π Key Formula
Definitions and calculations.
12
Enthalpies of atomization, sublimation, phase transition,
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π Key Formula
Definitions.
13
Enthalpies of hydration, ionization, and solution
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Definitions.
14
Spontaneity of processes
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π Key Formula
ΞS_universe > 0, ΞG < 0
15
S of the universe and G of the system as criteria for spontaneity
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π Key Formula
ΞG = ΞH - TΞS
16
G (Standard Gibbs energy change) and equilibrium constant
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π Key Formula
ΞGΒ° = -RT ln K