Name three active volcanoes

Given the three equations below, what is the heat of reaction for the production of glucose, c6h12o6, as described by this equation? 6c(s) + 6h2(g) + 3o2(g) → c6h12o6(s) c(s) + o2(g) → co2(g), ∆h = –393.51 kj h2(g) + ½ o2(g) → h2o(l), ∆h = –285.83 kj c6h12o6(s) + 6o2(g) → 6co2(g) + h2o(l), ∆h = –2803.02 kj