Advertisements
Advertisements
Question
∆S is expected to be maximum for the reaction
Options
\[\ce{Ca_{(S)} + 1/2O2_{(g)} -> CaO_{(S)}}\]
\[\ce{C_{(S)} + O2_{(g)} -> CO2_{(g)}}\]
\[\ce{N2_{(g)} + O2_{(g)} -> 2NO_{(g)}}\]
\[\ce{CaCO3_{(S)} -> CaO_{(S)} + CO2_{(g)}}\]
Solution
\[\ce{CaCO3_{(S)} -> CaO_{(S)} + CO2_{(g)}}\]
APPEARS IN
RELATED QUESTIONS
What is the usual definition of entropy?
What is the unit of entropy?
Identify the state and path functions out of the following:
- Enthalpy
- Entropy
- Heat
- Temperature
- Work
- Free energy
What are spontaneous reactions?
Calculate the entropy change in the system, and surroundings, and the total entropy change in the universe during a process in which 245 J of heat flows out of the system at 77°C to the surrounding at 33°C.
1 mole of an ideal gas, maintained at 4.1 atm and at a certain temperature, absorbs heat 3710 J and expands to 2 litres. Calculate the entropy change in the expansion process.
30.4 kJ is required to melt one mole of sodium chloride. The entropy change during melting is 28.4 JK−1 mol−1. Calculate the melting point of sodium chloride.
You are given normal boiling points and standard enthalpies of vapourisation. Calculate the entropy of vapourisation of liquids listed below.
Liquid | Boiling points (°C) | ΔH (kJ mol−1) |
Ethanol | 78.4 | + 42.4 |
You are given normal boiling points and standard enthalpies of vapourisation. Calculate the entropy of vapourisation of liquids listed below.
Liquid | Boiling points (°C) | ΔH (kJ mol−1) |
Toluene | 110.6 | + 35.2 |
Cyanamide (NH2CN) is completely burnt in excess oxygen in a bomb calorimeter, ΔU was found to be −742.4 kJ mol−1, calculate the enthalpy change of the reaction at 298 K.\[\ce{NH2CN_{(s)} + 3/2 O2_{(g)} -> N2_{(g)} + CO2_{(g)} + H2O_{(l)}}\] ΔH = ?