Which of the following statements are correct? 

i. The reverse direction of a spontaneous reaction will be nonspontaneous under the same reaction conditions. 

ii. Spontaneous processes are slow. 

iii. All reversible reactions are spontaneous. 

iv. There is no heat loss in an isothermal process. 

v. A reversible process can produce more work than an irreversible process

Identify which of the processes below are non-spontaneous.
i. formation of rust in iron exposed to air
ii. photosynthesis
iii. dissolution of salt in water
iv. melting of ice on a hot summer day

For a non-spontaneous process, which of the following statements is true?

I. The process will occur given enough time.

II. The process will never occur.

III. The process will occur in the presence of an external influence.