Homework Help: Physics

Posted by Lindsay on Wednesday, March 26, 2008 at 6:23pm.

A steam engine's boiler completely converts 155 kg of water to steam. This process involves the transfer of 3.5 x 10^8 J by heat. If steam escaping a safety valve does 1.76 x 10^8 J of work against the outside atmosphere, what is the net internal energy of the water-steam system?

Do I need to use the mass and specific heat of water to find Q, or am I making this more complicated than it is?

Physics - bobpursley, Wednesday, March 26, 2008 at 6:56pm
The heat used is given, the escaped heat is given, so the net stored internal energy is the difference. I think you are making it more complicated..
Physics - Lindsay, Wednesday, March 26, 2008 at 7:46pm
I don't use the mass at all then?
Physics - Cristian, Wednesday, January 19, 2011 at 7:38pm
Mass Does not need to be used.
Physics - cvbvc, Wednesday, March 9, 2011 at 10:20pm
cxv
Physics - POOPY, Sunday, May 5, 2013 at 1:18pm
10

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