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Question 19N.2.HL.TZ0.b(i)

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Date November 2019 Marks available [Maximum mark: 3] Reference code 19N.2.HL.TZ0.b(i)
Level HL Paper 2 Time zone TZ0
Command term Determine Question number b(i) Adapted from N/A
b(i).
[Maximum mark: 3]
19N.2.HL.TZ0.b(i)

determine the thermal energy removed from the system.

[3]

Markscheme

ALTERNATIVE 1

work done W=«-»250×103×1.5×10-3=«-»375«J» 

change in internal energy U=32×0.300×8.31×-150=«-»561«J»
OR
U=32PV=32×375=«-»563«J» 

thermal energy removed Q=375+561=936«J»
OR
Q=375+563=938«J» 

 

ALTERNATIVE 2

Q=«nCpT=»52×nRT 

thermal energy removed Q=0.300×2.5×8.31×150 

=935«J»