CHEM 1A Chapter 6.3-6.4: Lecture 29 prereading.docx
Document Summary
6. 4 quantifying heat and work heat transfer of thermal energy temperature measure of thermal energy thermal equilibrium system and surroundings reach same temperature q = cdt, where c is the heat capacity of the system: j/(cid:176)c depending on system (cid:224) higher heat capacity means smaller change in t for same amount of heat heat capacity amount of heat required to change temperature by 1 (cid:176)c extensive property depends on amount of matter intrinsic capacity depends on type of matter: specific heat capacity (cs) amount of heat required to raise temperature of 1 gram of substance by 1 (cid:176)c intensive property depend on kind of substance being heated, not amount, also: molar heat capacity (j/mol (cid:176)c) water has high heat capacity q = m cs dt for closed system: qsys = qsurr pressure volume work (alternative to heat as energy transfer is work (w)) w = fd.
