Answer
$\Delta$S $\approx$ 0
Work Step by Step
A gas and a solid are being converted into a similar amount of moles of a different gas and solid. This means that the entropy is changing very little.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.