You have water at 25°C. You dissolve ammonium nitrate, NH4NO3, in the water and find the temperature decreases to 13°C. Which of the following statements is TRUE? 1. The reaction is an exothermic process
2. Heat is transferring from the surrounding environment to the reaction
3.∆T of the water is positive
4.Heat is transferring from the reaction to the surrounding environment

The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?