Assignment-1

Assignment-1

1. Define Thermodynamics and mention its scope. State and explain the important laws of thermodynamics. What are its limitations?
2. State and explain the first law of thermodynamics. Derive a mathematical formulation of the law. Justify the law on the basis of some common observations and discuss its limitation.
3. Five moles of an ideal gas expand isothermally and reversibly at 27 C from an initially volume of 5dm to 50 dm against a pressure that is greatly reduced. Calculate G & S for the process. (R= 8.314 J/K/mol)
4. Calculate the change in entropy for one mole an ideal gas when its temperature rises from 300k to 600k (i) Isochoric condition (ii) Isobaric condition
Cv = 2.5R
5. Water boils at 373 K at one atmospheric pressure. At what temperature will it boil when atmospheric pressure becomes 528 mm of Hg at some space station? Latent heat of water = 2.28KJ/g
6. At 373.6 K and 372.6 K the vapour pressure of water are 1.018 and o.982 atm. resp. Calculate the heat of vaporization of water.
7. The free energy change ( G) accompanying a given process is – 85.77 and -83.68 kj at 25 C and 35 C respectively. Calculate the change in enthalpy for the process at 30 C.
8. Calculate the number of phases in the following:
(a) SR SM

(b) I2 (s) I2 (g)

(c) MgCO3(s) MgO(s) + CO2 (g)

(d) N2O4 (g) 2NO2(g)

9. How many degrees of Freedom are present in the following system?

a) A gas in equilibrium with its solution in a liquid
b) Two partially miscible liquids in the absence of vapour

10. What do you understand by condensed system.