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Review Exam 1 Spring 2008

Review Exam 1 Spring 2008 - system surroundings universe...

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system . surroundings . universe . thermodynamic state of a system The number of moles and identity of each substance. The physical states of each substance. The temperature of the system. The pressure of the system. Thermochemical standard state conditions The thermochemical standard T = 298.15 K. The thermochemical standard P = 1.0000 atm. Be careful not to confuse these values with STP. Thermochemical standard states of matter For pure substances in their liquid or solid phase the standard state is the pure liquid or solid. For gases the standard state is the gas at 1.00 atm of pressure.  For gaseous mixtures the partial  pressure must be 1.00 atm. For aqueous solutions the standard state is 1.00 M concentration. State Functions are independent of pathway: T (temperature), P (pressure), V (volume),  E (change in energy),  H (change in enthalpy –  the transfer of heat), and S (entropy) Examples of non-state functions are: n (moles), q (heat), w (work)
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