Chem heat and states of matter questions part 1

Which substance has vibrating particles in regular fixed positions

1-Ca(s)

2-Hg(l)

3- Cl2(g)

4-CaCl2 (aq)

1 - Ca(s)

At STP, which 2.0-gram sample of matter uniformly fills a 340 milliliter closed container?

1 - Br2 (l)

2- Fe(NO3)2(s)

3- KCl(aq)

4-Xe(g)

4- Xe(g)

In which sample is the average kinetic energy of the particles greatest?

1 - 10 ml of HCl(aq) At 25C

2 - 15 mL of HCl(aq) at 20C

3 - 10 mL of H20(l) at 35C

4 - 15 mL of H20(l) at 30C

3 - 10 mL of H2O(l) at 35C

A 1.0 gram sample of which element will uniformly fill a closed 2 liter container at STP?

1 - antimony

2 - sulfur

3 - tellurium

4 - xenon

4 - xenon

A few pieces of dry ice, CO2(s), at -78C are placed in a flask that contains air at 21C. The flask is sealed by placing an uninflated ballon over the mouth of the flask. As the ballon inflates, the dry ice disappears and no liquid is observed in the flask.

State the direction of heat flow that occurs between the dry ice and the air in the flask

From air to dry ice

A few pieces of dry ice, CO2(s), at -78C are placed in a flask that contains air at 21C. The flask is sealed by placing an uninflated ballon over the mouth of the flask. As the ballon inflates, the dry ice disappears and no liquid is observed in the flask.

Write the name of the process that occurs as the dry ice undergoes a phase change in the flask

Sublimation