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A thermodynamic system undergoes a process in which its internal energy decreases by 1,477 J. If at the same time 678 J of thermal energy is transferred to it, how much work (in J) is done by the system?

Respuesta :

Answer:2155 J

Explanation:

Given

Change in Internal energy [tex]\Delta U=-1477 J[/tex] i.e. decrease in Internal Energy

Heat added to system [tex]Q=678 J[/tex]

According First law for a system

[tex]dQ=dU+dW[/tex]

[tex]678=-1477+dW[/tex]

[tex]dW=2155 J[/tex]

Thus 2155 J of work is done by system                      

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