Question

Questions:

1) *Fill in the blank with increases, decreases, or stays the same.

A) If the temperature of a gas goes from 25 degrees Celsius to 100 degrees Celsius, the volume _________ at constant pressure and constant moles (amount) of gas.

B) If the volume of a gas goes from 1.0 L to 2.0 L, the pressure _________ at constant temperature and constant moles (amount) of gas.

C) If the temperature of a gas goes from 25 degrees Celsius to 100 degrees Celsius, the pressure ____________ at constant volume and constant moles (amount) of gas.

2) Order the following compounds in increasing polarity using electronegativity values: HF, CF, CBr, CO, Br2

_____________ < ______________ < ________________ < ______________ < _______________

3) Two bottles of gases are sitting on a shelf at 25 degrees Celsius. Bottle A contains hydrogen gas and bottle B contains helium gas

A) In which bottle do the molecules of gas have the higher average Kinetic Energy? _______________

B) In which bottle are the molecules moving faster (have a higher average velocity)? ______________

C) If not the same velocity, by how much faster is the velocity of the gases? **SHOW YOUR WORK**

4) Identify the chemical bonds as: Ionic, Polar Covalent, or Non-polar covalent using electronegativity values:

HF __________________

MgS _________________

LiBr __________________

CO __________________

Br2 __________________

5) What are the bond angles between the atoms of :

a) H2S _____________
b) CO2 _____________

c) SO3 _____________

d) NF3 ______________

Answer 1