1. It is possible to measure the enthalpy change for the two reactions below. Reaction equation ΔH°(kJ/mol·rxn) CH4(g) + 2O2(g) → CO2(g) + 2 H2O(g) CH3OH(g) + 3/2O2(g) → CO2(g) + 2H2O(g) -802.4 -676 Using Hess’s Law, determine the enthalpy change for the reaction below. CH4(g) + ½ O2(g) → CH3OH(g)

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

i just learnt this recently but i need to look through my notes again

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.