Chemistry Question Bank

The values of H and S for the reaction, (graphite) 2(g) (g) C CO 2CO → Are 170 kJ and 170 JK–1, respectively. This reaction will be spontaneous at (2009)

The heat liberated when 1.89 g of benzoic acid is burnt in a bomb calorimeter at 25 °C increases the temperature of 18.94 kg of water by 0.632 °C. If the specific heat of water at 25 °C is 0.998 cal/g-deg, the value o…

Enthalpy change for the reaction, 4H(g) 2H (g) → is – 869.6 kJ. The dissociation energy of H–H bond is (CBSE AIPMT 2011)

If the enthalpy change for the transition of liquid water to steam is 30 kJ mol–1 at 27°C, the entropy change for the process would be (2011)

Standard enthalpy of vaporisation o vap H for water at 100°C is 40.66 kJ mol–1. The internal energy of vaporisation of water at 100°C (in kJ mol–1) is (2012)

In which of the following reactions, standard reaction entropy change (∆S°) is positive and standard Gibbs energy change (∆G°) decreases sharply with increasing temperature? (2012)

When 5 litres of a gas mixture of methane and propane is perfectly combusted at 0°C and 1 atmosphere, 16 litres of oxygen at the same temperature and pressure is consumed. The amount of heat released from this combust…

For the reaction, X2O₄(l) → 2XO₂(g) ∆U = 2.1 kcal, ∆S = 20 cal K–1 at 300 K Hence, ∆G is (2014)

For a sample of perfect gas when its pressure is changed isothermally from pi to pf, the entropy change is given by. (NEET-II 2016)

Consider the following liquid-vapour equilibrium. Liquid ⇌ Vapour Which of the following relations is correct? (NEET-I 2016) (a) v H dln P dT T (b) v H d ln P dT RT (c) v H dln G dT RT (d) v H d ln P dT RT

An ideal gas expands isothermally from 10–3 m3 to 10–2 m3 at 300 K against a constant pressure of 105 N m–2. The work done on the gas is (Odisha NEET 2019)

In which case change in entropy is negative? (NEET 2019)

Thermodynamics deals with

Which of the following macroscopic variable is not measurable?

Which of the following is an example of open system?

Closed system can exchange (with surroundings)

Which of the following is true about isolated system?

Which of the following is not a state function?

Which of the following is a state function?

Which of the following is a path function?

Which of the following is not an intensive property?

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

Tea placed in thermos flask is an example of

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

Which of the following processes is irreversible?