The balloon containing which gas is the largest balloon? You are holding four identical balloons each containing 10.0 g of a different gas.The volume of the container more than doubles.The pressure in the container more than doubles.
755 MMHG TO ATM DOWNLOAD
If you actually perch a bowling ball on your thumbnail, the pressure experienced is twice the usual pressure, and the sensation is unpleasant.To download a copy of the assignment, please click on the link Sample Questions.Īs you work these matter and measurement problems, consider and explain: These may seem like huge amounts, and they are, but life on earth has evolved under such atmospheric pressure. At sea level, this pressure is roughly the same as that exerted by a full-grown African elephant standing on a doormat, or a typical bowling ball resting on your thumbnail. The atmosphere above us exerts a large pressure on objects at the surface of the earth, roughly equal to the weight of a bowling ball pressing on an area the size of a human thumbnail.Ī dramatic illustration of atmospheric pressure is provided in this brief video, which shows a railway tanker car imploding when its internal pressure is decreased.Ī smaller scale demonstration of this phenomenon is briefly explained.Ītmospheric pressure is caused by the weight of the column of air molecules in the atmosphere above an object, such as the tanker car. In fact, normal air pressure is strong enough to crush a metal container when not balanced by equal pressure from inside the container.
Although the force of each collision is very small, any surface of appreciable area experiences a large number of collisions in a short time, which can result in a high pressure. Gas pressure is caused by the force exerted by gas molecules colliding with the surfaces of objects ( Figure 1). Although we do not normally notice atmospheric pressure, we are sensitive to pressure changes-for example, when your ears “pop” during take-off and landing while flying, or when you dive underwater. The earth’s atmosphere exerts a pressure, as does any other gas.
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