Phases and Entropy

Which sample of matter has the greatest distance between molecules at STP?

• N₂(g)

• NH₃(aq)

• C₄H₁₆(l)

• NaCl(s)

Tags

NGSS.HS-PS1-3

Which substance will occupy the container completely and uniformly?

• Hg(l)

• O₂(g)

• NaCl(aq)

• C₆H₁₂O₆(s)

Which sample of CO₂ has a definite shape and a definite volume?

• CO₂(aq)

• CO₂(l)

• CO₂(g)

• CO₂(s)

The particles in a crystalline solid are arranged

• regularly and close together

• regularly and far apart

• randomly and close together

• randomly and far apart

Tags

NGSS.HS-PS1-3

At which temperature would the molecules in a sample of water have the lowest average kinetic energy?

• 5 K

• 100 K

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

An metal bar at 325 K is placed in a sample of water. The metal bar gains energy from the water if the temperature of the water is

• 65 K

• 338 K

• 45 K

• 318 K

Tags

NGSS.HS-PS3-4

The temperature of a sample of matter is a measure of the

• average kinetic energy of its particles

• average potential energy of its particles

• total kinetic energy of its particles

• total potential energy of its particles

Tags

NGSS.HS-PS3-2

The provided diagram shows a system of gases with the valve closed. As the valve is opened, the entropy of the gaseous system

• decrease

• increase

• remain the same

Tags

NGSS.HS-PS3-4

During which phase change does one mole of carbon dioxide increase in entropy?

Which phase change is exothermic?

Tags

NGSS.HS-PS1-4