19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
For vaporization of water at 1 atmospheric pressure, the values of ∆H and ∆S are 40.63 kJ mol–1 and 108.8 J K–1 mol–1, respectively. The temperature when Gibbs’ energy change (∆G) for this transformation will be zero,…
In endothermic reactions,
Which one among the following is the correct option for right relationship between CP and CV for one mole of ideal gas? (NEET 2021)
Which of the following statements is correct for the spontaneous adsorption of a gas? (2014)
For the gas phase reaction, PCl g PCl g Cl g Which of the following conditions are correct?
G is the net energy available to do useful work and is a measure of free energy. If a reaction has positive enthalpy change and positive entropy change, under what conditions will the reaction be spontaneous?
The standard free energy change G is related to K (equilibrium constant) as
2 moles of ideal gas at 27°C temperature is expanded reversibly from 2 lit. to 20 lit. find entropy change. (R = 2 cal/mol K)
Which one of the following is correct? (a) G H T S
Which law states that entropy of all pure crystalline solids is zero at absolute zero?
A reaction has ∆H = – 33 kJ and ∆S = +58 J/K. This reaction would be :
It is impossible for a reaction to take place if (a) H is +ve and S is +ve (b) H is –ve and S is +ve (c) H is +ve and S is –ve (d) H is –ve and S is –ve
Which of the following statements is not correct?
In which of the following cases, the reaction is spontaneous at all temperatures ?
Pick out the wrong statement
The respective examples of extensive and intensive properties are
Identify the correct statement regarding entropy.
When ice melts into water, entropy
The entropy change when two moles of ideal monoatomic gas is heated from 200°C to 300°C reversibly and isochorically?
Entropy of the universe is
The statement “The change of enthalpy of a chemical reaction is same whether the reaction takes place in one or several steps” is
When one mole of an ideal gas is compressed to half of its initial volume and simultaneously heated to twice its initial temperature, the change in entropy of gas (∆S) is :
In an adiabatic expansion of ideal gas
Which of the following processes is a non-spontaneous process?
Which of the following processes is reversible?