Chemistry Standard 12>Chapter 4 - Chemical Thermodynamics>Exercises>Q 1

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The correct thermodynamic conditions for the spontaneous reaction at all temperatures are

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Important Questions on Chemical Thermodynamics

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Chemistry Standard 12>Chapter 4 - Chemical Thermodynamics>Exercises>Q 1

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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Chemistry Standard 12>Chapter 4 - Chemical Thermodynamics>Exercises>Q 1

In which of the following, entropy of the system decreases?

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Chemistry Standard 12>Chapter 4 - Chemical Thermodynamics>Exercises>Q 1

The enthalpy of formation for all elements in their standard states is

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Chemistry Standard 12>Chapter 4 - Chemical Thermodynamics>Exercises>Q 1

Which of the following reactions is exothermic?

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Chemistry Standard 12>Chapter 4 - Chemical Thermodynamics>Exercises>Q 1

6.24 g

of ethanol are vaporized by supplying

5.89 kJ

of heat. Enthalpy of vaporization of ethanol will be

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12th Maharashtra Board

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Chemistry Standard 12>Chapter 4 - Chemical Thermodynamics>Exercises>Q 1

If the standard enthalpy of formation of methanol is

- 238.9 kJ {mol}^{- 1}

then entropy change of the surroundings will be

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Chemistry Standard 12>Chapter 4 - Chemical Thermodynamics>Exercises>Q 1

Which of the following are not state functions?

1. $Q + W$

2. $Q$

3. $W$

4. $H - TS$

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12th Maharashtra Board

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Chemistry Standard 12>Chapter 4 - Chemical Thermodynamics>Exercises>Q 1

For vaporization of water at 1 bar,

ΔH = 40.63 kJ {mol}^{- 1}

and

ΔS = 108.8 J K^{- 1} {mol}^{- 1}

. At what temperature,

ΔG = 0

?