The digestion of food is exergonic since chemical bonds are broken and energy is released.

Cindy had liposuction to remove adipose tissue years ago. However, she has since gained back nearly all the weight lost through the procedure. She does not understand why she gained weight since she learned that adipocytes lack the ability to divide in adults. Speculate on a reason why she gained weight.

Consider the reaction X → Y + Z. Which of the following is a possible rate law?

Consider the reaction: 4 HCl(g) + O2(g) ↔2 H2O(g) + 2 Cl2(g), given the following equations and H values, determine ∆H° for the reaction using Hess’s law H2(g) + Cl2(g) ↔ 2 HCl(g) ∆H = -185 kJ 2 H2(g) + O2(g)  ↔2 H2O(g)      ∆H = -484 kJ

The following system is at equilibrium. X(g) + Y(g) ↔ Z (g)The best statement to describe the system is

If a tree dies and the trunk remains undisturbed for 13,535 years, what percentage of original 14C/12C ratio is still present? (t1/2= 5730 years)

Use the following information to determine the activation energy for the reaction shown below. 2NO –> N2 + O2 Temperature (K) Rate Constant (L/mol·s) 1400 0.143 1500 0.693

An acid is a substance that produces OH – ions in water.

The rate constant for the beta decay of thorium-234 is 2.882 x 10–2 / day. What is the half-life of this nuclide?

For a particular chemical reaction ΔH = 5.8 kJ and ΔS = –23 J/K. Under what temperature condition is the reaction spontaneous?