The picture below shows two bulbs connected by a stopcock. The 6.00-L bulb conta

Question

The picture below shows two bulbs connected by a stopcock. The 6.00-L bulb contains nitric oxide at a pressure of 0.543 bar, and the 2.00-L bulb contains oxygen at a pressure of 0.815 bar NO 02 After the stopcock is opened, the gases mix and react to produce nitrogen dioxide. 2NO Considering that the volume remains unchanged during the experiment, how does the total pressure in the bulbs change if the reaction is allowed to go to completion? O O O O The total pressure will increase. The total pressure will decrease. There is not enough information to determine how the total pressure will change. The total pressure will remain constant.

Explanation / Answer

In the net reaction
2NO(g) + O2 (g) —> 2 NO2(g)

3 molecule of reactant gives only 2 molecule of product
So,
number of molecule of gas is decreasing during reaction
So, pressure must also decrease

Answer: the total pressure will decrease

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