Question

Carbon disulfide (CS2) is a toxic, highly flammable substance. The following thermodynamic data are available for CS2(l) and CS2(g) at 298 K:

	ΔH∘f (kJ/mol)	ΔG∘f (kJ/mol)
CS2(l)	89.7	65.3
CS2(g)	117.4	67.2

1. Liquid CS2 burns in O2 with a blue flame, forming CO2(g) and SO2(g). Write a balanced equation for this reaction.

2. Using the data in the preceding table and in Appendix C in the textbook, calculate ΔH∘ and ΔG∘ for the reaction in part D.

3. Use the data in the preceding table to calculate ΔS∘ at 298 K for the vaporization of CS2(l).

4. Using data in the preceding table and your answer to part 3, estimate the boiling point of CS2(l).

Answer 1

1. Carbon disulfide is highly toxic and flammable substance. When it burns with oxygen it produces carbon dioxide and Sulfur dioxide.

The chemical reaction can be written as

The balanced reaction is written as:

Now we have C, S, O atoms in overall reaction.

After balancing , the number of oxygen atoms at reactant side 6 as well as at product side 6

The number of C atom at reactant side is 1 and at product side is also 1

The number of Sulfur atom at reactant side is 2 and also at product side is 2.

This answer of question number 1.