Chemistry Question Bank

For the reaction, 8 g 2 g 2 g l C H 5O 3CO 4H O → at constant temperature, H E is (2003)

The heat of formation of Fe O s is –824.2 kJ mol–1. ∆H for the reaction. 2Fe O s 4Fe s 3O g → is:

When 0.5 g of sulphur is burnt to SO₂ 4.6 kJ of heat is liberated. What is the enthalpy of formation of sulphurdioxide?

105. (∆U – ∆H) for the formation of NH₃ from N₂ and H₂ is :

The molar heat capacity of water at constant pressure, C, is 75J K-1. When 1.0 kJ of heat is supplied to 100 g of water which is free to expand, the increase in temperature of water is. (2003)

The densities of graphite and diamond at 298 K are 2.25 and 3.31 g cm–3, respectively. If the standard free energy difference is equal to 1895 J mol–1, the pressure at which graphite will be transformed into diamond a…

The following data is known about the melting of a compound AB. ∆H = 9.2 kJ mol–1. ∆S = 0.008 kJ K–1mol–1. Its melting point is :

For the reaction, 2H O g 2H g O g → ∆H = 571.6 KJ fH of water is :

H and E  for the reaction, Fe O s 3H g 2Fe s H O l → at constant temperature are related as (a) H E (b) H E RT (c) H E RT (d) H E 3RT

The enthalpy of vaporisation of a compound AB at its boiling point (127°C) is 6.4 kJ mol-1. Its entropy of vaporization is

∆H for the reaction, SO g O g SO g ∆H = –98.3 kJ If the enthalpy of formation of SO₃(g) is –395.4 kJ then the enthalpy of formation of SO₂(g) is :

If the bond energies of H–H, Br–Br, and H–Br are 433, 192 and 364 kJ mol–1 respectively, the H for the reaction 2(g) 2(g) (g) H Br 2HBr → is (2004)

A thermally isolated gaseous system can exchange energy with the surroundings. The mode of energy may be

Which of the following is a state function and also an extensive property?

Which of the following is not an intensive property?

Which of the following is intensive property?

Which of the following is a path function?

Enthalpy change for the reaction, 4H(g)  → 2H₂(g) is – 869.5 kJ. The dissociation energy of H–H bond is

Which of the following is a state variable?

The volume of gas is reduced to half from its original volume. The specific heat will____.

Which of the following quantities is not a state function?

Which of the following is not a state function?

Which of the following is not a state function?

The densities of graphite and diamond at 298 K are 2.25 and 3.31 g cm–3, respectively. The standard free energy difference ( G ) is equal to 1895 J mol–1, the pressure at which graphite will be transformed into diamon…

Which of the following reactions define o f G ? (a) diamond C O g CO g → (b) H g F g HF g → (c) H P O H O 2H PO → (d) SO g O g SO g →