Energetics and Kinetics
GCE Chemistry
10 Energetics and Kinetics practice questions covering everything you need for GCE.
Drill Energetics and Kinetics →Sample Energetics and Kinetics questions
a) (i) Define the term 'standard enthalpy of combustion'. (ii) State Hess's Law of constant heat summation. b) Using the following standard enthalpies of formation, calculate the standard enthalpy of…
a) (i) Define the term 'rate of reaction'. (ii) State THREE factors that affect the rate of a chemical reaction. b) The following data were obtained for the reaction between hydrogen peroxide (H2O…
Which of the following factors does NOT affect the rate of a chemical reaction?
Using the data below, calculate the standard enthalpy of formation of methane, CH₄(g). C(s) + O₂(g) → CO₂(g), ΔH = −394 kJ mol⁻¹ H₂(g) + ½O₂(g) → H₂O(l), ΔH = −286 kJ mol⁻¹ CH₄(g) + 2O₂(g) → CO₂(…
A catalyst increases the rate of a chemical reaction by
Which of the following statements correctly describes an exothermic reaction?
The graph of ln(rate) against 1/T for a chemical reaction gives a straight line with a negative slope. This slope is equal to
Which of the following correctly explains why increasing temperature increases the rate of a chemical reaction?
Given that the activation energy of a reaction is 80 kJ mol⁻¹ and a catalyst lowers it to 50 kJ mol⁻¹, what is the reduction in activation energy?
The standard enthalpy of combustion of ethanol is −1368 kJ mol⁻¹. How much heat is released when 2.3 g of ethanol is completely burned? [Molar mass of ethanol = 46 g mol⁻¹]