Question

question 1 what unit is commonly used to express the standard free energy change, δg, in chemistry? newtons (n) kilocalories (kcal) kilopascals (kpa) kilojoules (kj) question 2 which process is spontaneous based on the standard free energy change (δg)? δg = +50 kj δg = 0 kj δg = -100 kj δg = +100 kj

Explanation:

In chemistry, the standard free - energy change ($\Delta G$) is commonly expressed in kilojoules (kJ). A spontaneous process has a negative $\Delta G$. Kilopascals (kPa) are for pressure, kilocalories (kcal) are also an energy unit but less common for $\Delta G$ in chemistry compared to kJ, and Newtons (N) are for force.

Answer:

Kilojoules (kJ)

For Question 2: A spontaneous process has a negative standard free - energy change. So, $\Delta G=- 100\ kJ$ represents a spontaneous process.