1-31-2011 Lecture Notes - First law of thermodynamics...

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First law of thermodynamics relates various forms of kinetic and potential energy in a system to the work a system can perform and to the transfer of heat Energy is conserved ∆E = q + w First law allows for many possible stated to exist- requires that energy is conserved but doesn’t place a restriction on the direction a process must take Experience tell us that processes have preferred directions… Leads to 2 nd law of thermodynamic and the idea of spontaneity 2 nd law – predictive tool, determines whether or not a process will occur, are there conditions we can change to alter direction of chemical process (influence spontaneity) Spontaneity - in the thermodynamic sense, the natural direction of a process without regard to whether it occurs rapidly and/or easily Doesn’t necessarily mean a quick process or even an observable rate. Can be slow (rusting of iron) Can be fast (acid-base neutralization) The sign of change in H cannot be used to predict a spontaneous change -
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This note was uploaded on 02/23/2011 for the course CHEM 1200 taught by Professor Mcintosh during the Spring '08 term at Rensselaer Polytechnic Institute.

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1-31-2011 Lecture Notes - First law of thermodynamics...

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