| Energy
Conservation (cont.) |
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| We will now
also account for energy tranfer via Heat Transfer |
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| The
general most general form of conservation of energy for a system |
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be written as: dE = dQ-dW where (Ch.
3, YAC) |
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| dE º Change in Total Energy,
E |
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| and E = U(internal energy)+Em(mechanical
energy) (Ch. 1 YAC) |
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| ̃ | E = U
+ KE (kinetic energy) + PE(potential energy) |
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| dW º Work done by the system
where |
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| W = Wext(external work) +
Wflow(flow work) |
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| dQ = Heat transfer into
the system (via conduction, convection & radiation) |
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| Convention:
dQ > 0 net heat transfer into the system (Convention Q,q..) |
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dW > 0, positive work done by the system |
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| Q: What is Internal Energy ? |
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