Can you provide some examples of Hess's Law practice problems?

Answer 1

Here are some examples of Hess's Law practice problems:

1. Calculate the enthalpy change for the reaction: 2H2(g) O2(g) - 2H2O(l) using the following information: H2(g) 1/2O2(g) - H2O(l) H -286 kJ/mol H2(g) 1/2O2(g) - H2O2(l) H -196 kJ/mol

2. Determine the enthalpy change for the reaction: 2C(s) 3H2(g) - C2H6(g) given the following data: C(s) O2(g) - CO2(g) H -393.5 kJ/mol H2(g) 1/2O2(g) - H2O(l) H -285.8 kJ/mol C2H6(g) 7/2O2(g) - 2CO2(g) 3H2O(l) H -1560 kJ/mol

These examples involve using Hess's Law to manipulate and combine given reactions to determine the overall enthalpy change for a desired reaction.