The scale on a rotameter for gas is calibrated only for that type of gas under specific conditions (typically at standard conditions of 1 atm and 25∘C). Consider a scenario where a rotameter calibrated for air is used to measure the flow rate of pure oxygen at a given non-standard condition of $(P_N, T_N)$.

Question

10-10-2025
Mathematics

High School

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The scale on a rotameter for gas is calibrated only for that type of gas under specific conditions (typically at standard conditions of 1 atm and 25∘C). Consider a scenario where a rotameter calibrated for air is used to measure the flow rate of pure oxygen at a given non-standard condition of $(P_N, T_N)$.

Answer :

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ayushgupta030303 ayushgupta030303 · Answer 1 · 2024-05-08T03:39:44-04:00

Final answer:

A rotameter's scale is only calibrated for a specific gas at standard conditions, so it will not accurately measure the flow rate of a different gas at different conditions. To measure the flow rate of pure oxygen accurately, a standard thermometer, such as a constant-volume gas thermometer, can be used.

Explanation:

A rotameter is a device used to measure the flow rate of a gas. However, the scale on a rotameter is calibrated only for a specific type of gas and at standard conditions of 1 atm and 25∘C. In the case of using a rotameter of air to measure the flow rate of pure oxygen at different conditions (PN,TN), the scale will not be accurate.

In order to measure the flow rate of pure oxygen accurately, a standard thermometer such as a constant-volume gas thermometer can be used. This thermometer consists of a vessel of constant volume filled with gas, and the change in pressure is proportional to the temperature change. By measuring the temperature accurately, the flow rate of pure oxygen can be determined.

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