If 1.00 kcal of heat is added to 1.2 L of oxygen in a cylinder at constant pressure of 1.000 atm, the volume increases to 1.5 L, Hence E for this process is:

1. 0.993 kcal

2. 1.0073 kcal

3. 0.0993 kcal

4. 1.00073 kcal

Subtopic:  Enthalpy & Internal energy |
 57%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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Heats of combustion of CH4, C2H4, C2H6 are -890, -1411 and -1560 kJ/mole respectively. Which has the lowest fuel value in kJ/gm ?

1. CH4

2. C2H4

3. C2H6

4. All same

Subtopic:  Thermochemistry |
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The standard heat of combustion of a hydrocarbon compound is an/a-

1. Extensive property

2. Colligative property

3. Intensive property

4. Constitutive property

Subtopic:  Classification of System, Extensive & Intensive Properties |
 50%
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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

Subtopic:  Thermochemistry |
 60%
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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

Subtopic:  Hess's Law |
 59%
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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

Subtopic:  Gibbs Energy Change |
 68%
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Using only the following data:

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

(II) Fes+CO2gFeOs+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

Subtopic:  Enthalpy & Internal energy |
 74%
From NCERT
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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 at room temp by the gas (in calories) in pushing back the atmosphere is 

1. 1000

2. 820

3. 1640

4. 2200

Subtopic:  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

Subtopic:  First Law of Thermodynamics |
 89%
From NCERT
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For which change HE

1. H2+I22HI

2. HCl+NaOHNaCl+H2O

3. Cs+O2gCO2g

4. N2+3H22NH3

Subtopic:  Enthalpy & Internal energy |
 84%
From NCERT
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