Submitted by MrsTichenor2011 on Wed, 2012-03-21 19:40

a system has 2.50 × 102 kcal of work done to it, and releases 5.00 × 102 kJ of heat into its surroundings, what is the change in internal energy of the system?

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You are adding 2.50 x 10^2 kcal and releasing 5.00 x 10^2 kJ. So the difference is the change in internal energy of the system. You will need to convert kcal to kJ or vice verse to do the subtraction

kingchemist

Thu, 2012-03-22 07:03