Answer:
The reaction with smallest value of K is :
A + B → 2 C; E°cell = -0.030 V
Explanation:

where :
n = number of electrons transferred
F = Faraday's constant = 96500 C
= standard electrode potential of the cell
R = Gas constant = 8.314 J/K.mol
T = temperature of the reaction = ![25^oC=[273+25]=298K](https://tex.z-dn.net/?f=25%5EoC%3D%5B273%2B25%5D%3D298K)
= equilibrium constant of the reaction
As we cans see, that standard electrode potential of the cell is directly linked to the equilibrium constant of the reaction.
- Higher
higher will be the value of K. - Lower
lower will be the value of K.
So, the reaction with smallest value of electrode potential will have smallest value of equilibrium constant. And that reaction is:
A + B → 2 C; 
Well, each ml of water requires one calorie to go up 1 degree Celsius, so this liter of water takes 1000 calories to go up 1 degree Celsius. (There are 1000 ml, each of which needs to have its temperature raised.)
Mass is the amount of matter an object has. We often use a triple-balance beam to measure mass. A triple-beam balance gets its name because it has three beams that allow you to move known masses along the beam. Here is a picture of a triple beam balance.