Chemistry Exam Notes: Pressure and Boiling Point

Q34 Pressure

• Reaction: $N<em>2 + 3F</em>2 \rightarrow 2NF_3$
• Initial Partial Pressures:
  • $N_2$: 1 atm
  • $F_2$: 1.8 atm
• Reaction Completion: The reaction goes to completion, and $V$ (volume) and $T$ (temperature) remain constant.
• Objective: Determine the maximum partial pressure of $NF_3$ produced.
• Relationship: Since volume (V) and temperature (T) are constant, the number of moles is directly proportional to the partial pressure.

Calculations

• Based on $N_2$:
  • 1 atm $N<em>2$ can produce: $1 \text{ atm } N</em>2 \times \frac{2 \ NF<em>3}{1 \ N</em>2} = 2.0 \text{ atm } NF_3$
• Based on $F_2$:
  • 1.8 atm $F<em>2$ can produce: $1.8 \text{ atm } F</em>2 \times \frac{2 \ NF<em>3}{3 \ F</em>2} = 1.2 \text{ atm } NF_3$
• Limiting Reactant: $F<em>2$ is the limiting reactant because it produces less $NF</em>3$.
• Maximum Partial Pressure of $NF_3$: 1.20 atm

Q37 Boiling Point

• (No content provided in the transcript for this question)