Kirchhoff's equation
Chemical Thermodynamics · Chemistry
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Study notes
Let's find the heat of a reaction at 350 K, given the heat at 300 K is 50 kJ/mol. Step 1: Identify ΔH1 = 50 kJ/mol. T1 = 300 K, T2 = 350 K. Let the change in heat capacity ΔCp = 0.1 kJ/mol·K. Step 2: Calculate temperature change: ΔT = T2 - T1 = 350 - 300 = 50 K. Step 3: Calculate the heat adjustment: ΔCp × ΔT = 0.1 × 50 = 5 kJ/mol. Step 4: Find the final enthalpy: ΔH2 = ΔH1 + 5 = 50 + 5 = 55 kJ/mol. Answer: The heat of reaction at 350 K is 55 kJ/mol.