11 At constant pressure which of the following reactions inv

11. At constant pressure, which of the following reactions involves the system doing work on the surroundings? A) CH4(g) + 2 Odg) CO2(g) + 2H20(g) B) 2 ZnS(s) + O2(g) 2 ZnO(s) + 2 S(s) C) D) NHA (1) + 02 (g) N2 (g) + 2H20 (1) E) All of the above. 2 H2O2(g) O2(g) + 2H20(g)

Solution

We know that all combustion reactions are exothermic in nature so heat energy is released there by they do some work on the surroundings.

C is also an exothermic reaction so it can also do some work on the surroundings.

Therefore option E is correct.