The Kirchhoff's equation gives the effect of....on heat of reaction.

1. Pressure

2. Temperature

3. Volume

4. Molecularity

Concept Questions :-

CP and CV and Relation for Real Gas
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The temperature of 5 ml of a strong acid increases by 5 when 5 ml of a strong base is added to it. If 10 ml of each is mixed, temperature should increase by-

1. 5

2. 10

3. 15

4. cannot be known

Concept Questions :-

Thermochemistry
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The heat of neutralisation of HCl by NaOH is -55.9 kJ/mole. If the heat of neutralisation of HCN by NaOH is -12.1 kJ/mole, then energy of dissociation of HCN is-

1. -43.8 kJ

2. 43.8 kJ

3. 68 kJ

4. -68 kJ

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For a reaction at equilibrium-

1. G=G=0

2. G=0 but not G

3. G=0 but not G

4. G=G0

Concept Questions :-

Gibbs Energy Change
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Using only the following data:

(I) Fe2O3s+3COg2Fe(s)+3CO2(g);H=-26.8 kJ

(II) Fes+COgFeOs+COg;H=+16.5 kJ

the H value, in kilojoules, for the reaction

Fe2O3s+COg2FeOs+CO2g is calculated to be:

1. -43.3

2. -10.3

3. +6.2

4. +10.3

Concept Questions :-

Enthalpy and It's Type
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82 litres of carbon dioxide are produced at a pressure of 1 atm by the action of acid on a metal carbonate. The work done by the gas (in calories) in pushing back the atmosphere is (R = 0.082 litre-atm deg-1mol-1)

1. 1000

2. 820

3. 1640

4. 2000

Concept Questions :-

First Law of Thermodynamics
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Among the following, the reaction for which H=E is-

1. PCl5gPCl3g+Cl2g

2. H2g+Cl2g2HClg

3. C2H5OHl+3O2g2CO2g+3H2Ol

4. C2H4g+H2gC2H6g

Concept Questions :-

First Law of Thermodynamics
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For which change HE

1. H2+I22HI

2. HCl+NaOHNaCl+H2O

3. Cs+O2gCO2g

4. N2+3H22NH3

Concept Questions :-

Enthalpy and It's Type
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Enthalpy change when 1.00 g water is frozen at 0C, is :

Hfus=-1.435 kcal mol-1

1. 0.0797 kcal

2. -0.0797 kcal

3. 1.435 kcal

4. -1.435 kcal

Concept Questions :-

Enthalpy and It's Type
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One mole of hydrogen gas at 25C and 1 atm pressure is heated at constant pressure until its volume has doubled. Given that Cv for hydrogen is 3.0 cal deg-1 mol-1, the H and E for this process are-

1. H = 1490 cal and E = 894 cal

2. H E= 1490 cal

3. H = 894 cal and E= 1490 cal

4. H E= 894 cal

Concept Questions :-

CP and CV and Relation for Real Gas
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Difficulty Level: