Based on the following data, what is the standard Gibbs free energy of formation of the sulfate ion at 298 K? ( R = 8.31 J/(K ∙ mol)) PbSO4(s) Pb2+(aq) + SO42–(aq); Ksp = 1.7 × 10–8

Substance ΔG°f (kJ/mol) at 298 K
Pb2+(aq)
–24.4

PbSO4(s)
–813.0
a. –788.6 kJ/mol

b. –793.1 kJ/mol

c. –837.4 kJ/mol

d. –744.3 kJ/mol

e. 832.9 kJ/mol

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

Why is permeable soil best for plants that need a lot of drainage?

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?