Date | November 2012 | Marks available | 1 | Reference code | 12N.1.hl.TZ0.18 |
Level | HL | Paper | 1 | Time zone | TZ0 |
Command term | Question number | 18 | Adapted from | N/A |
Question
Consider the following information:
\[\begin{array}{*{20}{l}} {{\text{CaC}}{{\text{O}}_{\text{3}}}{\text{(s)}} \to {\text{CaO(s)}} + {\text{C}}{{\text{O}}_{\text{2}}}{\text{(g)}}} \\ {\Delta H = + 179{\text{ kJ}}\,{\text{mo}}{{\text{l}}^{ - 1}}} \\ {\Delta S = + 161.0{\text{ J}}\,{{\text{K}}^{ - 1}}{\text{mo}}{{\text{l}}^{ - 1}}} \end{array}\]
What happens to the spontaneity of this reaction as the temperature is increased?
A. The reaction becomes more spontaneous as the temperature is increased.
B. The reaction becomes less spontaneous as the temperature is increased.
C. The reaction remains spontaneous at all temperatures.
D. The reaction remains non-spontaneous at all temperatures.
Markscheme
A