1. Foundations

Thermodynamics — Quiz

Test your understanding of thermodynamics with 5 practice questions.

Practice Questions

Question 1

Which thermodynamic quantity determines whether a biochemical reaction is spontaneous under constant pressure and temperature?

Question 2

Calculate the Gibbs free energy change ($\Delta G$) for a reaction with $\Delta H = -50\,\mathrm{kJ/mol}$ and $\Delta S = -0.1\,\mathrm{kJ/mol\cdot K}$ at $298\,\mathrm{K}$.

Question 3

Under standard biochemical conditions (pH 7, 25 °C, 1 M), the actual $\Delta G$ of a reaction is related to the standard $\Delta G^\circ\prime$ by which equation?

Question 4

Which of the following best describes the entropy change ($\Delta S$) for the hydrolysis of ATP to ADP and inorganic phosphate in aqueous solution?

Question 5

A reaction has $\Delta H = +20\,\mathrm{kJ/mol}$ and $\Delta S = +0.1\,\mathrm{kJ/mol\cdot K}$. Above what temperature will this reaction become spontaneous ($\Delta G<0$)?