What is ∆G system for the system that is described by the following data? ∆H system= -232 kJ, T= 293 K, ∆S system= 195 J/K
∆G system= ∆H system - T∆S system

a. -289 kJ
b. -175 kJ
c. 256 kJ
d. 56,903 kJ

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .