- #1
in10sivkid
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a quantity of gas in a cylinder receives 1600J of heat from a hot plate. At the same time 800J of work are done on the gas by outside forces pressing down on a piston. Calculate the change in thermal energy of the gas
Input heat Q = 1600J
The amount of work done on the gas is, W = 800J
now I'm not exactly sure how I'm supposed to set this up
do I use U = Q - W
or Q = W + U
so i either get 800J or 2400J for the answer for U
i know its a simple question but i think I'm just a bit confused conceptually. any help would be great :)
Input heat Q = 1600J
The amount of work done on the gas is, W = 800J
now I'm not exactly sure how I'm supposed to set this up
do I use U = Q - W
or Q = W + U
so i either get 800J or 2400J for the answer for U
i know its a simple question but i think I'm just a bit confused conceptually. any help would be great :)