Click the ΔH is an extensive property button within the activity, and analyze the relationship between the two reactions that are displayed. The reaction that was on the screen when you started and its derivative demonstrate that the change in enthalpy for a reaction, ΔH, is an extensive property. Using this property, calculate the change in enthalpy for Reaction 2.
Reaction 1: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g), ΔH1 = − 2043 kJ
Reaction 2: 3C3H8(g) + 15 O2(g) → 9 CO2(g) + 12 H2O(g), ΔH2 = ?
Express your answer to four significant figures and include the appropriate units.
Open the activity depicting Hess's Law.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Hess's Law concept. You can view video lessons to learn Hess's Law. Or if you need more Hess's Law practice, you can also practice Hess's Law practice problems.