Loading [MathJax]/jax/output/CommonHTML/fonts/TeX/fontdata.js

User interface language: English | Español

Date November 2014 Marks available 1 Reference code 14N.1.hl.TZ0.18
Level HL Paper 1 Time zone TZ0
Command term Question number 18 Adapted from N/A

Question

Consider the values of ΔHΘ and ΔSΘ À for the reaction of nitrogen with oxygen at 298 K.

     N2(g)+O2(g)2NO(g)     ΔHΘ=+181 kJmol1

          ΔSΘ=+25 JK1mol1

Which statement is correct for this reaction?

A.     ΔGΘ is positive at all temperatures.

B.     ΔGΘ is negative at all temperatures.

C.     ΔGΘ  is positive at high temperatures.

D.     ΔGΘ is positive at low temperatures.

Markscheme

D

Examiners report

[N/A]

Syllabus sections

Additional higher level (AHL) » Topic 15: Energetics/thermochemistry » 15.1 Energy cycles
Show 40 related questions

View options