Thermochemistry

Helium (He)

Oxygen (O2)

Nitrogen (N2)

Carbon Dioxide (CO2)

the entropy of a system at absolute zero is a constant

None of the above

Heat always move from hotter object to colder objects

The total energy of the universe is constant

Energy flowed out of the system

System gained thermal energy

System lost thermal energy

Work was done by the system

0

positive

negative

cannot be determined

Periodic fluctuations

Same rate

Faster cooling

Slower cooling

Calculating solubility constants for salts with differing molar masses dissolved in water until saturation points are achieved uniformly.

Analyzing electric conductivity values for solutions made from compounds differing only by molecular mass after equal heating periods.

Measuring viscosity differences across liquids with varying molecular masses as they reach room temperature from heated states.

Using a gas effusion setup to compare rates for light versus heavy gases reaching equilibrium through identical pinhole openings under similar conditions.

It increases.

It becomes zero.

It remains constant.

It decreases.

Both kinetic energy distribution broadens, and rate constant k decreases due to reduced number of efficient collisions.

Kinetic energy distribution narrows while rate constant k decreases owing to decreased collisions with proper orientation.

Both kinetic energy distribution broadens, and rate constant k increases due to more molecules having sufficient energy to overcome activation barrier.

Kinetic energy distribution remains unchanged but rate constant k increases as collisions become more frequent.

A cooling object continuing to decrease in temperature until all molecular motion ceases completely at absolute zero.

One material transferring sound waves more efficiently due to particle collisions transmitting kinetic energy as vibrations rather than heat transfer.

A single block increasing in temperature when exposed to a constant source of light radiation until it starts emitting visible light.

Two blocks of different materials reaching the same final temperature after being in contact for some time without external influence.

Iodine molecules lose overall internal potential energy while transitioning from solid to gas state.

Iodine molecules gain enough kinetic energy to overcome intermolecular forces without passing through a liquid phase.

Iodine atoms rearrange themselves from crystalline lattice structures directly into gaseous form with minimal movement.

No net exchange occurs between potential and kinetic energies within iodine particles during this transition phase.