| Date | May 2016 | Marks available | 1 | Reference code | 16M.1.hl.TZ0.16 |
| Level | HL | Paper | 1 | Time zone | TZ0 |
| Command term | Derive | Question number | 16 | Adapted from | N/A |
Question
The equation for the formation of ethyne is:
2C(s) + H2 (g) → C2H2 (g)
What is the enthalpy change, in kJ, for this reaction using the enthalpy of combustion data below?
A. 2 × (−394) + \(\frac{1}{2}\) (−572) − \(\frac{1}{2}\) (−2602)
B. 2 × (−394) + (−572) − (−2602)
C. 2 × (−394) + \(\frac{1}{2}\) (−572) + \(\frac{1}{2}\) (−2602)
D. 2 × (−394) + (−572) + (−2602)
B. 2 × (−394) + (−572) − (−2602)
C. 2 × (−394) + \(\frac{1}{2}\) (−572) + \(\frac{1}{2}\) (−2602)
D. 2 × (−394) + (−572) + (−2602)
Markscheme
A
Examiners report
[N/A]
