Question

Select all of the following reactions that are endothermic.
H2(g) + ½O2(g) → H2O(g), ΔH = -57.83 kcal/mole
½N2(g) + ½O2(g) → NO(g), ΔH = +21.6 kcal/mole
½N2(g) + O2(g) + 8.1 kcal → NO2(g)
½N2(g) + 3/2H2(g) → NH3(g) + 11.0 kcal/mole
NH3(g) → ½N2(g) + 3/2H2(g), ΔH = +11.0 kcal/mole

Answer 1

Honestly how're you supposed to tell its endo, or exo..

Answer 2

This all looks like a whole bunch of stuff just jumbled together.

Answer 3

You have to clear out the equations. Its confusing without the arrows. An endothermic reaction is a type of reaction that absorbs energy in the form of heat from the surroundings. Since the energy term is on the reactants side, then energy participates in the reaction as a reactants and therefore is absorbed. so therefore A,C and D are endothermic reactions.

Answer 4

yeah, the equations freak me out.. but i see what you're saying now(: thanks so much(: @summerforever21

Answer 5

yeah well it took me awhile too get it too but once i figured it out it was pretty easy but im glad too help you and those equations would probally freak anybody out :)

Answer 6

haaha thankyou(: