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# chem question watch

1. http://pmt.physicsandmathstutor.com/...%20Entropy.pdf

question 8c

markscheme:
ΔG (b) = ΔG (a)
(492.7 × 103 - T × 542.6) = (-24.8 × 103 - T × 15.2) (1)
517.5 × 103 = 527.4 T (1)
T = 981.2 K(1)
Allow 980 - 982 Penalise missing 1000 by one mark

I dont get it and also how do they rearrange this
2. It was a stretch and challenge question, never* to be repeated again.

*highly unlikely.

The MS answers the Q as well as I can and the rearrangement is basic algebra, grouping the T terms on one side and scaling.

Make sure you understand the Q and what it is attempting to get the candidate to do, before attempting to understand the MS.

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