Question 6.4: Calculate the change in internal energy when 2 moles of CO a...

Calculate the change in internal energy when 2 moles of CO are converted to 2 moles of $CO_{2}$ at 1 atm and 25°C:

2CO(g) + O_{2}(g) → 2CO_{2}(g) ΔH = −566.0   kJ/mol

Strategy We are given the enthalpy change, ΔH, for the reaction and are asked to calculate the change in internal energy, ΔU. Therefore, we need Equation (6.10). What is the change in the number of moles of gases? ΔH is given in kilojoules, so what units should we use for R?

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