1) Which of the following does NOT represent a specific element in its standard state? Optional Answers: 1

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1) Which of the following does NOT represent a specific element in its standard state? Optional Answers:

1. Mg(s)

2. Br2(l)

3. Hg(l)

4. H(g)

 

2. For which of the following reaction equations would the enthalpy of the reaction be equal to the standard molar enthalpy of formation of solid sodium fluoride?

Optional Answers:

1. 2Na(s) + F2(g) -> 2NaF(s)

2. Na(s) + 1/2F2(g) -> NaF(s)

3. Na(s) + F(g) -> NaF(s)

4. Na+(g) + F-(g) -> NaF(s)

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10.7

1. How many of which type(s) of bond(s) would need to be broken to completely break apart one mole of carbon disulfide? Optional Answers:

1. Two carbon-sulfur triple bonds

2. Two carbon-sulfur single bonds

3. Two carbon-sulfur double bonds

4. Four carbon-sulfur single bonds

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11.1

1. A sample of each of the following gases is held at 300 K. Which gas particles will have the HIGHEST average molecular speed? Optional Answers:

1. Argon

2. Helium

3. Neon

4. Krypton

 

2. Which of the following gases will have the SLOWEST rate of diffusion? Optional Answers:

1. Fluorine

2. Neon

3. Argon

4. Chlorine

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11.4

1. Which of the following changes would lead to a DECREASE in the volume of a gas? Optional Answers:

1. Increasing the number of moles of gas

2. Increasing the temperature

3. Increasing the external pressure

 

2. According to the equation H2(g) + Cl2(g) -> 2HCl(g), how many liters of HCl(g) will be formed when 2.0 L of H2(g) react with 3.0 L of Cl2(g)? Pressure and temperature are constant Optional Answers:

1. 2.0 L

2. 3.0 L

3. 6.0 L

4. 4.0 L

 

3. A confined sample of gas at a constant external pressure has a certain volume at 27 degrees C. At what temperature, in degrees C, will the volume of the gas be doubled? Optional Answers:

1. 54 C

2. 873 C

3. 600 C

4. 327 C

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11.5

1. Which of the following gases would have the HIGHEST density at STP? Optional Answers:

1. Krypton (Kr)

2. Xenon (Xe)

3. Radon (Rn)

4. Argon (Ar)

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11.6

1. Gases will behave MOST ideally at: Optional Answers:

1. High temperatures and high pressures

2. Low temperatures and low pressures

3. Low temperatures and high pressures

4. High temperatures and low pressures

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11.7

1. To calculate the TOTAL pressure of gases in a mixture, the individual partial pressures should be: Optional Answers:

1. Divided

2. Multiplied

3. Subtracted

4. Added