1. Tardigrade
  2. Question
  3. Chemistry
  4. Find the amount of oxygen gas (O2) measured at a temperature of 0oC and pressure of 1 atm, which is needed for the combustion of 1 L of propane gas (C3 H8) measured under the same temperature and pressure conditions.

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Find the amount of oxygen gas $\left(O_{2}\right)$ measured at a temperature of $0^{o}C$ and pressure of 1 atm, which is needed for the combustion of 1 L of propane gas $\left(C_{3} H_{8}\right)$ measured under the same temperature and pressure conditions.

NTA AbhyasNTA Abhyas 2020

Solution:

Writing the equation of combustion of propane $\left(C_{3} H_{8}\right)$ , we get
$\text{C}_{3}\text{H}_{8} & + & 5\text{O}_{2} & \rightarrow & 3\text{CO}_{2} & + & 4\text{H}_{2}\text{O} \\ \text{1 vol} & & \text{5 vol} & & & & \\ 1 \, \text{L} & & \text{5 L} & & $
From the above equation we find that we need 5 L of oxygen at NTP to completely burn 1 L of propane at NTP
If we change the conditions for both the gases from NTP to same conditions of temperature and pressure. The same results are obtained. i.e. 5 L is correct answer.