A copper block of mass m' at temperature 'T1' is kept in the open atmosphere at temperature T2' where T2 > T1 . The variation of entropy of the copperblock with time is best illustrated by

(1)

(2)

(3)

(4)

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Heat produced in calories by the combustion of one gram of carbon is called

(1) Heat of combustion of carbon

(2) Heat of formation of carbon

(3) Calorific value of carbon

(4) Heat of production of carbon

Concept Questions :-

Thermochemistry
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For the isothermal expansion of an ideal gas

(1) E and H increases

(2) E increases but H decreases

(3) H increases but E decreases

(4) E and H are unaltered

Concept Questions :-

Internal Energy and work done
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If a refrigerator's door is opened, then we get [CPMT 1980]

(1) Room heated

(2) Room cooled

(3) More amount of heat is passed out

(4) No effect on room

Concept Questions :-

Enthalpy and It's Type
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Point out the wrong statement in relation to enthalpy

(1) It is a state function

(2) It is an intensive property

(3) It is independent of the path followed for the change

(4) Its value depends upon the amount of substance in the system

Concept Questions :-

Extensive and Intensive Properties
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Which of the following is zero for an isochoric process

(1) dP

(2) dV

(3) dT

(4) dE

Concept Questions :-

Thermodynamics' Properties and process
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Mark the correct statement

(1) For a chemical reaction to be feasible, ΔG should be zero

(2) Entropy is a measure of order in a system

(3) For a chemical reaction to be feasible, ΔG should be positive

(4) The total energy of an isolated system is constant

Concept Questions :-

Types of System
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Internal energy is an example of [Pb. PMT 2000]

(1) Path function

(2) State function

(3) Both (1) and (2)

(4) None of these

Concept Questions :-

Extensive and Intensive Properties
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The intensive property among these quantities is [KCET 2002]

(1) Enthalpy

(2) Mass/volume

(3) Mass

(4) Volume

Concept Questions :-

Extensive and Intensive Properties
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Which of the following is not a state function [DCE 2002]

(1) ΔS

(2) ΔG

(3) ΔH

(4) ΔQ

Concept Questions :-

Extensive and Intensive Properties
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Difficulty Level: