CHEM 230 Lecture Notes - Lecture 3: Water Gas, Molar Mass, Bond Length

• School: U of M
• Department: Chemistry
• Course: CHEM 230
• Professor: Amy Gottfried

Document Summary

Convenient state function to track energy changes at const pressure automatically accounting to for work. It is a state function that is used to monitor change of heat in our system. )t"s the change in energy + work (cid:523)but we"ll take out the work from the equation(cid:524) So our change in enthalpy is equal to any amount of energy put in or taken out of the system. Heat capacity is different for solids and liquids in comparison to gases. For solids and liquids, c,volume and c,pressure end up being the same. To go from cs to cm, just multiple by the molar mass (mw) m in this case means mass. The substance with the lowest heat capacity needs the least amount of energy to raise the temperature by 1 kelvin. One system gains heat (positive sign), one loses it (negative sign) The two will exchange heat until both of them have the same average kinetic energy (same temperature)