Thermodynamics questions
1906 published questions with worked solutions.
- The values of H and S for the reaction C(graphite)+CO_2(g) 2CO(g) are 170 kJ and 170 JK^ -1 respectively. This reaction will be...
- The enthalpy and entropy change for the reaction Br_2(l)+Cl_2(g) 2BrCl(g) are 30 kJ mol^ -1 and 105 JK^ -1 mol^ -1 respectively....
- The total entropy change for a system and its surroundings increases, if the process is
- The mathematical form of the first law of thermodynamics when heat (q) is supplied and W is work done by the system (+ve) is
- A thermodynamic state function is
- When the change of entropy is greater, then the ability for work is
- The entropy change for the reaction given below, 2H_2(g)+O_2(g) 2H_2O(l), at 300 K. Standard entropies of H_2(g), O_2(g) and...
- At absolute zero, the entropy of a perfect crystal is zero. This is ... of thermodynamics.
- If 50 calorie are added to a system and the system does work of 30 calorie on surroundings, the change in internal energy of the...
- The Gibbs energy change and standard Gibbs energy change are equal if the reaction quotient is equal to
- Which is not a spontaneous process?
- If S^ for H_2, Cl_2 and HCl are 0.13, 0.22 and 0.19 kJK^ -1 mol^ -1 respectively. The total change in standard entropy for the...
- Select the correct limitations of the third law of thermodynamics.
- For a spontaneous chemical change the Gibbs energy change is
- Given that H^ _ r,298K =-54.07 kJ mol^ -1 and S^ _ r,298K =10 J mol^ -1 K^ -1 and R=8.314 JK^ -1 mol^ -1 . The value of _ 10 K...
- Enthalpy of vaporisation for water is 186.5 kJ mol^ -1 . The entropy change during vaporisation is ... kJ ,K^ -1 mol^ -1 .
- Entropy change of fusion at constant pressure is given by
- Identify the correct statement for change of Gibbs energy for a system ( G_ system ) at constant temperature and pressure
- In which of the following reactions is the standard reaction entropy change ( S^ ) positive, and the standard Gibbs energy change...
- One mole of ice is converted into water at 273 K. The entropies of H_2O(s) and H_2O(l) are 38.20 and 60.01 J mol^ -1 K^ -1...
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