Physical Chemistry Answers

1.0 x 102mol of an ideal gas at 3.0 x 102K temperature and 6.0 x 10 6Pa pressure occupies 4.16 x 10-2m3space. Calculate the work done and heat absorbed by the gas if it undergoes expansion isothermally and reversibly to
0.832 m3volume and 3.0 x 10 5Pa pressure.

Calculate the equilibrium constant at 298 K for the cell reaction taking place in the cell
Al (s) J A13+ (c1 ) II Cu2+ (c2) I Cu (s), given that E0 = -F66 V and
A.1 3+ /
E0 = 0.34 V.
Cu 2+/Cb

A solution contains 0.05 M acetic acid and 01 M sodium acetate. Calculate the concentration of H+,
when HC1 is added to the solution such that
[HC1] = 1.0 x 10-3M.
Kafor acetic acid = 1.8 x 10-5.

An orthorhombic crystal has the following
parameters :
a = 8.2 x 10-10m
b = 9.4 x 10-10m
c = 7.5 x 10-10m
Find the distance between (123) planes.

Calculate the pressure change if two moles of
steam at 5 x 102K occupying 0.03 m3of volume
is heated up to 1 x 103 K at constant volume.
Assume that steam behaves as Van der Waals
gas. It is given that

Four cylinders of volume 4L,3L,2L,1L of He, Cl2, CO2, NH3, then ratio of no of atoms is:

Find the ph of a 0.3molar solution of h202 dissolved in 500ml of water

Question 1
If we mixed 45cm^3 of 2m NaOH with 20cm^3 of 1m HCL and obtained a temperature difference of 9.4°C, what would be the heat of reaction, the enthalpy?.
Question 2
If we added 10cm^3 HCL of an unknown concentration to 30cm^3 of 2M NaOH and obtained a temperature change of 4.5°C and then added 20cm^3 of the same unknown acid to 30cm^3 of 2M NaOH and obtained a temperature change of 9.0°C, what is the concentration of the acid? Use the enthalpy value from question 1

If carbon-carbon Bond length in diamond is 1.5 angstorm then what will be the edge length of the cubic closed packed unit cell of diamond having alternate tetrahedral voids occupied?

The fundamental and 1st overtone of a molecule are found at 2886 cm^-1 and 5668 cm^-1 respectively. Calculate the equilibrium oscillation wave no. and the anharmonicity constant.