Thermodynamics

Question 1

what values are given to w and q when work is done ON the system & heat is added TO system.

Answer 1

negative

positive

Question 2

what is enthalpy and what is it denoted by?

Answer 2

H = E + PV

state function

Question 3

what is significant concerning change in G values within the cell?

Answer 3

So large and negative and []s of metabolites so small that doesn’t normally reach 0 until all reactants consumed.

Question 4

what type of functions are work and heat?

Answer 4

process quantities

values depend on specific transition between two eqm states

Question 5

What three mechanisms increase the entropy of molecules?

Answer 5

Increased vibrato and rotation of atoms around bonds

Degree of scatter of molecules

Number of molecules.

Question 6

Why and how are metabolic reactions irreversible?

Answer 6

One or more reactions that can’t be reverted in a pathway

Ensures pathway can proceed to completion.

Question 7

Define a ‘coupled reaction’.

Answer 7

Two or more reactions in which the products of one are the reactants of the second.