CHEM 128 Study Guide - Final Guide: Endothermic Process, Heat Capacity, Enthalpy
Document Summary
Chapter 5: thermochemistry: system + surroundings = universe. In a system/surrounding, energy either comes in or out. The work, w, is positive if it is done on the system and negative if it is done by the system. Internal energy ( u) is a type of quality known as a state function, whereas heat and work are not state functions. It is the total energy of the thermodynamic system: h = u + pv, since it is derived from three state functions (u, p, and v), enthalpy is also a state function. Joules: defined as the amount of energy used when a force of 1 newton moves an object 1 meter. 1 j = 1 kg m2/s2: 1 cal = 4. 184 j. Calculate the quantity of heat that is released when the temperature of 1. 50x102 g of gold (cid:272)ha(cid:374)ges f(cid:396)o(cid:373) (cid:1011)(cid:1007). (cid:1012) c to (cid:1009)(cid:1008). (cid:1010) c: solution: q = mcd t = 0. 13j g deg.
