Physics (AS & A Level) · Oct / Nov 2016 · Paper 42 · Question 3
9702
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3(a)[2]
(sum of/total) potential energy and kinetic energy of (all) molecules/particles reference to random (distribution) [2]
3(b)(i)[3]
no heat enters (gas)/leaves (gas)/no heating (of gas) work done by gas (against atmosphere as it expands) internal energy decreases [3]
3(b)(ii)[3]
volume decreases so work done on ice/water (allow work done negligible because ∆V small) heating of ice (to break rigid forces/bonds) internal energy increases [3]
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