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107 Quantitative Exam Review_1

# 107 Quantitative Exam Review_1 - CHEM 107 Review Click to...

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Click to edit Master subtitle style Experiment 6 exp6
Enthalpy E = total energy q = heat w = work = -Δ(PV) = -PΔV (at constant P) ΔE = q – PΔV Use H = E + PV =>> ΔH = ΔE + Δ(PV) Finally, ΔH = q – PΔV + PΔV = q exp6

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1. Calculating the Heat Capacity 2. Calculating the heat (Enthalpy) 4.03 J g-1 oC-1 [ Mass of HCl added Mass of unknown g [ + = Cp sys = Cp sys ΔT qsyste m = Cp cal ΔT qcalorim eter Δ H = qsystem + qcalorimeter # grams of unknown exp6 Example : # 6 Sometimes, the heat for system is given. Therefore Calculate the heat for calorimeter and sum of both heat. 3. Calculating H per gram Cp cal is given
Temp (oC) Time (min) No data on 4th minute ΔT exp6

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Click to edit Master subtitle style Experiment 7 exp7
Calculations 1. Calculate PN2 (= Ptotal – PH2O) 2. Calculate the moles of N2 Remember converting Torr => atm, celcious => K, mL => L R = 0.08206 L atm/mol K 3. Calculate the moles of NaNO2 1:1 ratio reaction (same as the moles of N2) 4.

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