Graphite has a specific heat of 790 J Kg-1°C-1 . If a 20 gram piece of graphite is cooled from 38°C to 18°C, how much energy was lost by the graphite?
Grafit mempunyai muatan haba tentu sebanyak 790 J Kg-1°C-1. Jika 20 g grafit disejukkan dari 38°C to 18°C, Berapakah haba yang dibebaskan oleh grafit?
A 283.6 J
B 183.6 J
C 203 J
D 109 J
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ANSWER
A