Which of the following p-V curve represents maximum work done?

1.     
2.   
3.   
4.   
Subtopic:  2nd & 3rd Law of Thermodynamics |
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The work done when 1 mole of gas expands reversibly and isothermally from pressure of 5 atm to 1 atm at 300 K is

(Given log 5=0.6989 and R=8.314 J K-1 mol-1)
1.  zero J
2.  150 J
3.  +4014.6 J
4.  -4014.6 J

Subtopic:  First Law of Thermodynamics |
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Which one among the following is the correct option for right relationship between Cp and CV for one mole of an ideal gas ?

1. CP=RCV

2. CV=RCP

3. CP+CV=R

4. CPCV=R

Subtopic:  Cp & Cv |
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For irreversible expansion of an ideal gas under isothermal condition, the correct option is :

1. U=0, Stotal0

2. U0, Stotal=0

3. U=0, Stotal=0

4. U0, Stotal0

Subtopic:  Spontaneity & Entropy |
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Hydrolysis of sucrose is given by the following reaction

Sucrose + H2 Glucose + Fructose

If the equilibrium constant (Kc) is 2×1013 at 300 K, the value of rG at the same temperature will be:

1. 8.314 J mol-1 K-1×300 K×ln (2×1013)

2. 8.314 J mol-1 K-1×300 K×ln (3×1013)

3. -8.314 J mol-1 K-1×300 K×ln (4×1013)

4. -8.314 J mol-1 K-1×300 K×ln (2×1013)

Subtopic:  Gibbs Energy Change |
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For the reaction, 2Cl(g)  Cl2(g), the correct option is:

1. rH>0 and rS<0

2. rH<0 and rS>0

3. rH<0 and rS<0

4. rH>0 and rS>0

Subtopic:  Enthalpy & Internal energy | Spontaneity & Entropy |
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The correct option for free expansion of an ideal gas under adiabatic condition is:

1.  q=0, T<0 and w>0

2.  q<0, T=0 and w=0

3.  q>0, T>0 and w>0

4.  q=0, T=0 and w=0

Subtopic:  2nd & 3rd Law of Thermodynamics |
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If for a certain reaction rH is 30 kJ mol–1 at 450 K, the value of rS (in JK–1 mol–1) for which the same reaction will be spontaneous at the same temperature is:

1. 70

2. –33

3. 33

4. -70

Subtopic:  Spontaneity & Entropy |
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Under isothermal condition, a gas at 300 K expands from 0.1 L to 0.25 L against a constant external pressure of 2 bar. The work done by the gas is: [Given that 1 L bar=100 J]

1. 30 J

2. -30 J

3. 5 kJ

4. 25 J

Subtopic:  2nd & 3rd Law of Thermodynamics |
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In which case, change in entropy is negative?

1.  2Hg  H2g

2.  Evaporation of water

3.  Expansion of a gas at a constant temperature

4.  Sublimation of solid to gas

Subtopic:  Gibbs Energy Change |
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