Question

EXPERIMENT 12 Name MEASUREMENT OF THE GAS CONSTANT PRE-LAB EXERCISES Central to the study of gases is the idea of pressure. Historically pressure was determined as the ability the raise a column of mercury (Hg) to a particular height. Today, pressures are still often (erroneously) quoted just as a simple distance measurement, such as 75 cm. What is really meant is a column of Hg 75 cm high, so it is not too bad to say P - 75 cm Hg. Because this kind of statement still looks like a distance, the unit Torr was defined as the pressure required to raise a column of mercury 1 mm. In other words. 1 Torr = 1 mm Hg. 1. A typical pressure given by an American weather service is 30.6 inches. Convert this to torrs. Because it is close to a typical value of atmospheric pressure (at sea level, on a sunny day), the unit am (name atmosphere) was defined as (exactly) 760 Torr. 2. Convert the pressure of question 1 to atm.

Answer 1

5. Given pressure = 30,6 inches 1 inch - 2504 mm .: 3006 inch = 306X2504 = 777.24 mm .. pressure = 777.24 mm Of Hg [1 mmHg = 1 toro :. pressure = 777024 torr