Heat is added to a system, and the system does 49 J of work. If the internal energy increases by 7 J, how much heat was added to the system?

1 Answer
Jane
Mar 1, 2018

#56J#

Explanation:

From the #1# st law of thermodynamics we can say,if #dQ# amount of heat was added to the system as a result of which,it does #dW# amount of work and te internal enrgy increases by #dU#,then,

#dQ = dU+dW#

So, #dQ=7+49=56J#

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