Advertisements
Advertisements
प्रश्न
What is the unit of entropy?
उत्तर
SI unit of entropy is J K−1
APPEARS IN
संबंधित प्रश्न
The correct thermodynamic conditions for the spontaneous reaction at all temperature is
∆S is expected to be maximum for the reaction
What is the usual definition of entropy?
State the various statements of the second law of thermodynamics.
What are spontaneous reactions?
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 |
Calculate the enthalpy of hydrogenation of ethylene from the following data.
Bond energies of C − H, C − C, C = C and H − H are 414, 347, 618 and 435 kJ mol−1.
For the reaction at 298 K: \[\ce{2A + B -> C}\]
ΔH = 400 KJ mol−1; ΔS = 0.2 KJ K−1 mol−1 Determine the temperature at which the reaction would be spontaneous.