Transcript Higher Chemistry Unit 2 - Section 1 Fuels Multiple Choice Questions

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.
Higher Chemistry
Unit 2 - Section 2 Enthalpy
Multiple Choice Questions
1.
The potential energy diagram for the reaction
CO(g) + NO2(g) -> CO2(g) + NO(g)
is shown.
DH, in kJmol-1, for the forward reaction is
A. -361
B. -227
C. -93
D. +361
Answer
A.
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.
B.
C.
D.
the neutralisation of one mole of acid
the neutralisation of one mole of alkali
the formation of one mole of water
from one mole of H+ and OH- ions
the formation of one mole of salt
Answer
C.
Higher Chemistry
Unit 2 - Section 2 Enthalpy
Multiple Choice Questions
3.
Ethanol (C2H5OH) has a different enthalpy
of combustion from diethyl ether
(CH3OCH3) because the compounds have
different
A.
B.
C.
D.
molecular masses
bonds within the molecules
products of combustion
boiling points
Answer
B.
Higher Chemistry
Unit 2 - Section 2 Enthalpy
Multiple Choice Questions
4.
Which of the following represents an
exothermic change?
A.
B.
C.
D.
O2(g)
CH4(g)
2N(g)
H2O(g)
Answer
2O(g)
C(g) + 4H(g)
N2(g)
2H(g) + O(g)
C.
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.