Problem: Calculate ΔH°298 for the process Sb(s) + 5/2Cl2(g) ⟶ SbCl5(s)from the following information:Sb(s) + 3/2Cl2(g) ⟶ SbCl3(s)             ΔH°298 = −314 kJSbCl3(s) + Cl2(g) ⟶ SbCl5(g)            ΔH°298 = −80 kJ

🤓 Based on our data, we think this question is relevant for Professor Gowda's class at WVU.

FREE Expert Solution

We’re being asked to determine the enthalpy change (ΔH°298) for the chemical reaction:


Sb(s) + 5/2Cl2(g) ⟶ SbCl5(s)


We can use Hess’s Law to determine the enthalpy change of the overall reaction from the given reactions:


1. Sb(s) + 3/2Cl2(g) ⟶ SbCl3(s)             ΔH°1 = −314 kJ

2. SbCl3(s) + Cl2(g) ⟶ SbCl5(g)             ΔH°2 = −80 kJ


We now need to find a combination of reactions that when added up, gives us the overall reaction.


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Problem Details

Calculate ΔH°298 for the process Sb(s) + 5/2Cl2(g) ⟶ SbCl5(s)
from the following information:
Sb(s) + 3/2Cl2(g) ⟶ SbCl3(s)             ΔH°298 = −314 kJ
SbCl3(s) + Cl2(g) ⟶ SbCl5(g)            ΔH°298 = −80 kJ

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.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Gowda's class at WVU.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry - OpenStax 2015th Edition. You can also practice Chemistry - OpenStax 2015th Edition practice problems.