Q. Find the amount of oxygen gas measured at a temperature of and pressure of 1 atm, which is needed for the combustion of 1 L of propane gas measured under the same temperature and pressure conditions.

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A

7 L

B

6 L

C

5 L

D

10 L

Solution:

Writing the equation of combustion of propane , we get

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.

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