DP Chemistry (last assessment 2024)
Question 18M.2.hl.TZ2.d
| Date | May 2018 | Marks available | [Maximum mark: 1] | Reference code | 18M.2.hl.TZ2.d |
| Level | hl | Paper | 2 | Time zone | TZ2 |
| Command term | Calculate | Question number | d | Adapted from | N/A |
d.
[Maximum mark: 1]
18M.2.hl.TZ2.d
Enthalpy changes depend on the number and type of bonds broken and formed.
Calculate the standard free energy change, ΔGΘ, in kJ, for the reaction at 298 K using your answer to (b)(ii).
[1]
Markscheme
«ΔGΘ = ΔHΘ – TΔSΘ = 205 kJ – 298 K × kJ K–1 =» «+» 141 «kJ»
[1 mark]
