On one summer day, the sun heated the water in a swimming pool from 20C in the morning to 24C in the afternoon. If the pool held 40,000 liters of water(40,000,000 grams), how much energy in joules? The specific heat of water is 4.184 J/(g C).

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.