With a substantial stench the hydrogen sulfide gas is a poisonous gas like that of rotten eggs. It can be found in the natural gas like that used in the academic laboratories. The Hydrogen sulfide will burn in the oxygen as shown below.
Determine the standard enthalpy change for this reaction from the standard enthalpies of formation in kJ
2H2S(g)+ 3O2(g) yields 2SO2(g) + 2H2O(l)