thermo formulas

Thermodynamics - Just the Formulas

ΔU = Uf - Ui

ΔU = q + w

q   =   m Cs ΔT

q   =   n Cm ΔT

q   =   m ΔHtrans

q   =   n ΔHtrans

w   =   -PextΔV

w   =   -ΔngasRT

Δngas = (#mol gas prod) - (#mol gas react)

H = U + PV

ΔH = ΔU + PΔV

ΔU = ΔH - PΔV

ΔU = ΔH - ΔnRT

ΔH = qP

ΔU = qV

q   =   nRT ln(V2/V1)

w   =  –nRT ln(V2/V1)

qcal   =   -qsys

qcal   =   CcalΔT

qcal = mwater · Cs,water · ΔT + Chardware · ΔT

ΔHrxn = ΔH1 + ΔH2 + ΔH3 + ...

ΔHrxn° = ΣnΔHf° (products) - ΣnΔHf° (reactants)

ΔHrxn° ≈ ΣnΔHbond°(breaking) - ΣnΔHbond°(making)

ΔSuniv = ΔSsys + ΔSsurr

S  =  k ln Ω

ΔS  =  qrev / T

ΔS  =  n Cp ln(Tf / Ti)

ΔS  =   nR ln(V2/V1)

ΔStrans  =  ΔHtrans / Ttrans

ΔSrxn° = ΣnS° (products) - ΣnS° (reactants)

G   =   H - TS

ΔG = ΔH - TΔS

ΔGrxn° = ΣnΔGf° (products) - ΣnΔGf° (reactants)

ΔH = TeqΔS