Physical Chemistry Answers

Gas is compressed slowly and isothermally at 300K from 1 bar to 8 bar. Calculate

the work done using the given state of equation. (B = -5.397 X 10-6 m3

/mol)

(note: volume at each stage should be near to the ideal gas volume)

PV

RT = 1 +

B

V

Prove

(

∂T

∂P)

v

=

γ

γ − 1

[μJT +

v

Cp

]

Sketch with captions a·n electron impact-source of a mass spectrometer.

For the first order gas phase reaction of an organic compound at 130 0C at                     Ea is 108.4 kJmol-1and rate constant is 9.12x10-4 s-1. Calculate the standard entropy ΔS# of this reaction using eyring equation.

Define electrolytic cell.

When Pt electrodes are used in the electrolysis of KI(aq), a number of reactions are possible at the electrodes. 

Using a standard reduction potentials table (given in Lecture 22), predict which reaction is most likely to occur at the anode. 

The indicator methyl red has a pK_HIn = 4.95. It changes from red to yellow over the pH range from 4.4 to 6.2.

If the indicator is placed in a colourless buffer solution of pH = 4.55, what percent of the indicator will be present in the acid form, HIn?

For a solution that is 0.164 M NH₃ and 0.102 M NH₄Cl, calculate the [OH^-] and the pH value.