Physical Chemistry Answers

Liquid oxygen for use as a rocket fuel can be produced by cooling dry air to

           –183ºC, where the O2 condenses. How many liters of dry air at 25ºC and 750 torr would need to be processed to produce 150 L of liquid O2 at –183 ºC? (The mole fraction of oxygen in dry air is 0.21, and the density of liquid oxygen is 1.14 g/mL).

2. The oxidation potential of a Nickel half cell is 0.25 V and the reduction electrode potential of a silver half cell is 0.80 V. (a) Represent Nickel - Silver cell. (b) Give their electrode and net cell reactions and (c) Calculate the standard emf of Ni-Ag cell. (Hint: Eo Ag+/Ag > Eo Ni2+/Ni)

Write the half cell and net reaction of the given cell ; Cd(s)/Cd2+ (0.01M) // Cu2+(0.5M)/Cu. The standard reduction potentials are -0.40 V and 0.34 V respectively.

6. The EMF of cell, Cd(s)/Cd2+(0.01M) // Cu2+ (0.5 M)/Cu is 0.79 V. Determine the standard reduction potential of Cd electrode, if the standard electrode potential of copper is 0.34 V

Calculate the quantity 85.1 cm − 1.968 cm.

Which Intensive physical property is observed when the droppings of a person seated inside a closed room has able to reach that person who is 1 meter away from him after sneezing? If you were that person, what would you do to avoid this?

Calculate the work necessary to compress reversibly 0.200 mol of an ideal gas at 300 K from an initial volume of 4.00 L to a final volume of 2.00 L

The vapour pressure of acetone at 56.5 °C is 760 mmHg. What will be its vapour pressure at 25 °C if the heat of vaporization of acetone is 32.0 kJ/mol (Given R=8.314 J/Kmol).