Which of the following two scenarios results in higher gas emissions (which has a larger P*V value)? ? ?
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Which of the following two scenarios results in greater gas emissions? ? ? 1. The pressure inside the tower is 50 Kpag. If the replacement flow rate is 3 m3/h and a vent valve is installed, then the flow rate remains at 3 m3/h with a pressure of 50 Kpag. 2. Again, the pressure inside the tower is 50 Kpag; if the replacement flow rate is 3 m3/h and the valve is opened to allow air to enter, the pressure inside the tower will instantly drop as air escapes into the atmosphere. In this case, in addition to the 3 m3/h replacement flow, there is also an outflow of air, resulting in a decrease in gas pressure. If the effect of temperature is not taken into account, which of the two scenarios results in a higher P*V value? ? ?
PV=nRT, where R is a constant. Assuming T remains constant, in the initial stage the value of n is larger for the second scenario, so its PV value is also higher; later on, when equilibrium is reached, the values of n for both scenarios are the same, and therefore their PV values are equal as well.
The PV value is an inherent property of the valve and does not change due to external factors.