Physical Chemistry Answers

State Raoults law

If a = 0.244 atm-L²/mole²,and b = 0.0266L/mole, find the weight of H₂ stored in a 100-cm³ cylindrical tank at 100^oC and 100 atm ( or 10, 132.5 KPa) by using (a) the ideal gas equation (b) the van der Waals equation.

** to solve for the mass of H2, use the successive approximation method

The enthalpy of fusion of anthracene is 28.8 kJ mol-1

and its melting point is 217°C. Calculate its

ideal solubility in benzene at 25°C? (Mass of anthracene is 178.23 g/mol)

The constant-pressure heat capacity of a sample of a perfect gas was found to vary with temperature

according to the expression, Cp = 20.17 + 0.3665 T. Calculate q, w, U when the temperature is

raised from 25°C to 200°C at constant pressure. (R=8.314 JK-1mol-1

)

Why is it neccessary to acidify iron solution before titration

Predict and explain the effect of the given factors on the rate of the following reaction.

K₂S₂O₈ (aq)  + 2KI (aq)                 I₂ (aq)  +  2K₂SO₄ (aq)

a.   Adding more K₂S₂O₈

b.   Holding the reaction in a 4^◦ C water bath

The NMR spectroscopy is useful for the detection of

The NMR spectroscopy is useful for the detection of

The shielded proton requiring a external magnetic field of PMR signal is said to absorb upfield

The shielded proton requiring a external magnetic field of PMR signal is said to be absord upfield