Quiz on Spontaneity - Chemistry

What defines a spontaneous process?

• A process that requires continuous input of energy to occur

• A process that reverses itself automatically

• A process that can only occur in a laboratory setting

• A process that occurs naturally under certain conditions without external intervention

Which of the following is NOT a characteristic of a spontaneous process?

• It can occur without being driven by external forces

• It requires an external energy source to proceed

• It may occur rapidly or slowly

• It is not necessarily fast

What is the relationship between spontaneity and the speed of a process?

• All spontaneous processes are slow

• Nonspontaneous processes are always slow

• Spontaneity is not related to the speed of the process

• Spontaneity guarantees a process will be fast

Which isotope has a half-life that allows for rapid decay, making it useful in medical imaging studies?

• Technetium-99m

• Plutonium-239

• Uranium-238

• Carbon-14

Under typical ambient conditions, which form of carbon is thermodynamically stable?

• Graphite

• Diamond

• Buckminsterfullerene

• Carbon nanotubes

What demonstrates the dispersal of matter in a spontaneous process?

• Ice melting into water

• A solid subliming into a gas

• A gas condensing into a liquid

• Water freezing into ice

What happens when a valve between a flask containing gas and an empty flask is opened?

• The gas condenses

• The gas remains in the original flask

• The gas spontaneously expands to fill both flasks

• The empty flask fills with liquid

What is the result of heat flow between two objects at different temperatures?

• The hotter object gets hotter

• The colder object gets colder

• Heat flows spontaneously from the colder to the hotter object

• Heat flows spontaneously from the hotter to the colder object

What is the effect of spontaneous processes on the distribution of matter or energy?

• They only affect the distribution of energy, not matter

• They decrease the uniformity of matter or energy distribution

• They have no effect on the distribution of matter or energy

• They increase the uniformity of matter or energy distribution

How is energy redistributed when a spoon at room temperature is placed in a cup of hot coffee?

• Energy is evenly distributed between the spoon and coffee immediately

• Energy flows from the spoon to the coffee, cooling the spoon further

• No energy is exchanged between the spoon and coffee

• Energy flows from the coffee to the spoon, resulting in a more uniform distribution of thermal energy