Question

In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH₃CH₂OH and CO₂. Use data from the appendix to calculate the amount of heat in kJ when 7.227 mol of CO₂ are formed.

a) 183.4 kJ
b) 244.8 kJ
c) 366.6 kJ
d) 488.4 kJ

Answer 1

To calculate the amount of heat produced when 7.227 mol of CO₂ are formed, we use the enthalpy change of formation for CO₂ which is -394 kJ/mol. The total heat produced is approximately -2854 kJ.

Step-by-step explanation:

To calculate the amount of heat produced when 7.227 mol of CO₂ are formed, we need to use the enthalpy change of formation for CO₂. The enthalpy change of formation for CO₂ is -394 kJ/mol. To calculate the total heat produced, we use the equation:

Total heat = moles of CO₂ formed x enthalpy change of formation

Total heat = 7.227 mol x -394 kJ/mol = -2854 kJ

Therefore, the amount of heat produced when 7.227 mol of CO₂ are formed is approximately -2854 kJ.