In the first law of thermodynamics, angle e = q - w, what does angle e stand for? a. the heat added to the system b. the internal energy of the system c. the work done by the piston d. the change in the internal energy of the system

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

the answer is definitely c.