According to first law of thermodynamics, internal energy of the system for work done by the system or on the surrounding, is the sum of heat released and work done. Thus internal energy for the given system is 13155 J.
Internal energy of a system is the sum of all forms of energy in the system including its kinetic energy, potential energy, thermal energy etc.
According to first law of thermodynamics, the heat q released by the system is :
q = u - w.
Given that heat released q = 3500 J
work done = 9655 J
internal energy u = q + w
= 3500 J + 9655 J
= 13155 J.
Therefore, the internal energy of the system that releases 3500 j of heat and that does 9655 j of work on the surroundings is 13155 J.
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