Answer:
73.49 atm
Explanation:
The balance chemical equation is as follow,
C₃H₈ + 5 O₂ → 3 CO₂ + 4 H₂O
Given Data:
Temperature = T = 373 K
Volume = V = 2.5 L
Gas Constant = R = 0.0821 atm.L.mol⁻¹.K⁻¹
To find:
Pressure: P = ?
Formula:
P V = n R T
P = n R T / V
Here we also need to find number of mole,
According to balanced equation,
1 mole of C₃H₈ on combustion gives = 3 moles of CO₂
So,
2 moles of C₃H₈ on combustion will give = X moles of CO₂
Solving for X,
X = 2 moles of C₃H₈ × 3 moles of CO₂ ÷ 1 mole of C₃H₈
X = 6 moles of CO₂
Moles = n = 6 mol
Solution:
P = 6 mol × 0.0821 atm.L.mol⁻¹.K⁻¹ × 373 K ÷ 2.5 L
P = 73.49 atm
