Thermochemistry and Chemical Kinetics

Term 161

• Q4(a) [6]: Define order of a reaction, molecularity of a reaction and half life period.
• Q4(b) [5]: Show that for first order reactions the half life period is independent of the initial concentration.
• Q4(c) [3]: The half-life of a substance in a first order reaction is 20 minutes. Calculate the rate constant.
• Q6(a) [4]: What are exothermic and endothermic reactions?

Term 171

• Q3(a) [4]: Define order and molecularity of a reaction.
• Q3(b) [6]: Derive the rate equation for first order reaction.
• Q3(c) [4]: The rate constant for a first order reaction is \(1.54\times10^{-3}\,s^{-1}\). Calculate its half-life period.
• Q4(c) [4]: State the laws of thermochemistry.

Term 181

• Q2(a) [3]: What is the rate of reaction?
• Q2(b) [4+3]: Describe the equation to calculate the rate constant of a 1st order reaction and show the half-life of a 1st order reaction is independent of initial concentration of reactants.
• Q2(c) [4]: Compound A decomposes to form B and C, the reaction is 1st order. At 25°C the rate constant for the reaction is \(0.45s^{-1}\). What is the half-life of A at 25°C?

Term 201

• Q6(a) [6]: Derive mathematical expression for the rate constant of a reaction (A -> Products) of the first order.

Term 211

• Q7(c) [4]: Write the laws of thermochemistry.