Extent and rate of reaction 4

Question 1

Describe alkene stability.

Answer 1

• Trans are more stable than cis
• Adding hydrogen gives a 2 kjmol-1 difference
• Meaning cis is higher in energy and less stable

Question 2

Describe amide stability.

Answer 2

• Trans and are stable than cis
• Rotation is slow, due to delocalisation but due to size of R we get a mixture of both compounds to be present

Question 3

How can we calculate K for amides.

Answer 3

K = [amide with R groups (trans)]/[amide with R groups (cis)]

Question 4

Equation linking equilibrium constant and energy.

Answer 4

ΔG= -RTlnK