How much heat is absorbed when 30.00 g of C(s)reacts in the presence of excess SO₂(g)to produce CS₂(l)and CO(g)according to the following chemical equation? 5 C(s)+ 2 SO₂(g)→ CS₂(l)+ 4 CO(g)ΔH° = 239.9 kJ

Question

Quizplus · Accepted Answer

The given chemical equation shows that the reaction produces 239.9 kJ of heat per 5 moles of carbon reacted. 
We first need to convert the given mass of carbon into moles: 
30.00 g C x (1 mole C / 12.01 g C) = 2.498 moles C 
Using stoichiometry, we can set up a proportion: 
5 moles C / 239.9 kJ = 2.498 moles C / x 
Solving for x, we get: 
x = (2.498 moles C x 239.9 kJ) / 5 moles C = 119.8 kJ 
Therefore, the amount of heat absorbed when 30.00 g of C reacts is 119.8 kJ, and the best answer choice is A.

How Much Heat Is Absorbed When 30