Five hundred joules of heat are added to a closed system. the initial internal energy of the system is 87 j, and the final internal energy is 134 j. how much work is being done by the system? a) 221 j b) 279 j c) 366 j d) 453 j

453 Joules

       = 134 J - 87 J

          = 47 Joules

                  = 500 Joules - 47 Joules

                   = 453 joules

The work done is therefore, 453 joules.

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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