What is the value of δg°' (or, to put it another way, the cost) when 2nadp+ and 2h2o are converted to 2nadph plus 2h+ plus o2?

The chemical reaction is given as:

Here, oxygen is oxidised and is reduced. Thus, redox reaction occurs.

For cell reaction,          (2)

where, = standard state free energy

n= number of electrons

F= Faraday constant ()

= cell potential

Substitute the value of number of electrons i.e. 2, Faraday constant and cell potential in the formula to determine the value of  .

Now, calculate the value of cell potential

          (1)

= (standard reduction potential of )

= (standard reduction potential of )

Put the above values in formula (1), we get:

=

Now, substitute above value in formula (2)

=

Since, one coulomb volt is equal to one joule.

Thus, value of is equal to or

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .