Summative Test in General Chemistry 2

Which of the following processes is spontaneous?

• A ball thrown in the air.

• Cooling of a hot flat iron.

• Straightening curly hair.

• Coffee freezes on a hot day.

What is the statistical measure of entropy?

• Cooling of a system

• Heat of a system

• Disorder of a system

• Order of a system

Who proposed Gibbs free energy?

• Johannes Bronsted

• Thomas Gibbs

• Thomas Lowry

• William Gibbs

What type of reaction consists of a forward and backward reaction occurring simultaneously?

• Irreversible

• Nonspontaneous

• Reversible

• Spontaneous

For the reaction 2A + B ⇌ 2C the appropriate form for the equilibrium constant expression is:

• [A][B]2/[C]

• [C]2/[A]2 [B]

• [A]2[B]/[C]2

• [A][B]2/[C]

What principle states that changing the concentration or volume of any substance in a reaction causes it to proceed in whatever direction to restore the former balance?

• Chemical Equilibrium

• Law of Mass-Balance

• Le Chatelier's Principle

• Spontaneous Principle

What is acid according to Bronsted-Lowry?

• A proton donor

• An electron acceptor

• A proton acceptor

• A hydroxide donor

Water can both act as an acid and a base. What do you call the compound that exhibits such property?

• Acidic

• Basic

• Amphoteric

• Self-ionizing

What does it mean if a solution has a pH of 7?

• It is acidic.

• It is moderate.

• It is basic.

• It is neutral.

A buffer system keeps the pH of a solution because it comprises which of the following?

• A weak acid and a weak base

• A weak acid and its conjugate base

• A strong base and its conjugate acid

• A strong acid and its conjugate base