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Unformatted text preview: in internal energy Delta u = q + w Is always applicable you can always right that down when doing questions with thermochemistry o Transformation at constant pressure Look at slide page 17- rearranging and subbing into result in different equations Define state function • Enthalpy H= U + PV qP = delta h • The heat exchanged during a transformation at constant pressure is equal to the change in enthalpy A gas sample does work so it gives off joules and thus we would put this in a negative value – 100 j • Heat s received so we add heat to the system so then therefore -100 + 10 o-90 is the value of the answer o Under page 19 question There will be no change in volume of the gas mixture so there for the work is equal to 0. The reason we came up with this conclusion is because the amount of moles is the same o...
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