Unit 4 Thermodynamics. By: Elliot Prizant and Zak Abecassis. Thermodynamics. The study of the laws that govern the conversion of energy from one form to another, the direction in which heat will flow, and the availability of energy to do work. Specific Heat Capacity (C).
By: Elliot Prizant and Zak Abecassis
(mass of object) (temperature change)
[m(g)] x [ΔT(K)]
The average specific heat capacity of a human body is approximately 3500 J.kg-1.K-1. A certain Japanese sumo wrestler has a body mass of 200 kg. What is the wrestler's heat capacity?
The heat capacityof a body is obtained by multiplying its specific heat capacity by its mass in kilograms. In this case, the heat capacity of the wrestler is:3500 (J.kg-1.K-1) x 200 (kg) = 700000 (7.0x105) J.K-1
DE= +(reactant bonds)-(product bonds)
EX: 2N02 + H20 →HNO3 + HNO2
DE = (4 N-O + 2 H-O) – (5 N-O + 2 N-H)
DE =(4(201 KJ/mol) + 2(463 KJ/mol)) – (5(201 KJ/mol) + 2(391 KJ/mol))
DE = -57 KJ/mol
(note: some N-O bonds are probably double)
∆S < 0 ∆S > 0
Just remember you put the Thermo in Thermodynamics
Sadi Carnot (1796-1832): the "father" of thermodynamics