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Suppose 200 J of work is done on a system and 70.0 cal is extracted from the system as heat. In terms of the first law of thermodynamics, find the values (with the proper sign) of

Respuesta :

The change in internal energy is -93J

The energy that a system possesses is known as internal energy..

According to first law of thermodynamics,

q=U+W

E=q-W

Substituting the values, we get

E=-293-(-200)=-93J

The internal energy is -93J

  • The First Law of Thermodynamics states that energy cannot be created or destroyed; it can only be converted from one form to another.
  • The law of conservation of energy states that the total energy of any isolated system (for which energy and matter transfer through the system boundary are not possible) is constant;
  • Energy cannot be generated or destroyed, but it may be converted from one form to another, making the total energy of any isolated system constant (for which energy and matter transfer via the system border is not conceivable).

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