1. Higher Chemistry Unit 1 Section 2 Enthalpy Multiple Choice Questions This is designed to be used by teachers to help students develop skills in answering multiple choice questions.

2. Higher Chemistry Unit 2 - Section 2 Enthalpy Multiple Choice Questions 1. The potential energy diagram for the reaction CO(g) + NO 2 (g) -> CO 2 (g) + NO(g) is shown.  H, in kJmol -1, for the forward reaction is A. -361B. -227C. -93 D. +361 Answer A.

3. Higher Chemistry Unit 2 - Section 2 Enthalpy Multiple Choice Questions 2. The enthalpy of neutralisation in an acid/alkali reaction is always the energy released in A. the neutralisation of one mole of acid B. the neutralisation of one mole of alkali C. the formation of one mole of water from one mole of H + and OH - ions from one mole of H + and OH - ions D. the formation of one mole of salt Answer C.

4. Higher Chemistry Unit 2 - Section 2 Enthalpy Multiple Choice Questions 3. Ethanol­ (C 2 H 5 OH) has a different enthalpy of combustion from diethyl ether (CH 3 OCH 3 ) because the compounds have different A.molecular masses B.bonds within the molecules C.products of combustion D.boiling points Answer B.

5. Higher Chemistry Unit 2 - Section 2 Enthalpy Multiple Choice Questions 4. Which of the following represents an exothermic change? A.O 2 (g)2O(g) B.CH 4 (g)C(g)+ 4H(g) C.2N(g)N 2 (g) D.H 2 O(g)2H(g) + O(g) Answer C.

6. Higher Chemistry Unit 2 - Section 2 Enthalpy Multiple Choice Questions 5. The enthalpy change for the forward reaction can be represented by A. x B. y C. x + y D. x - y Answer B.