Author Question: Sometimes an experiment requires a certain pure gas to be used at reduced pressure. One way to ... (Read 39 times)

danielfitts88 · **on:** Jul 29, 2018

Sometimes an experiment requires a certain pure gas to be used at reduced pressure. One way to achieve this is to purchase a sealed glass container filled with the gas,

and to introduce the gas into a vacuum by attaching the glass container to the vacuum chamber and breaking the tip of the glass container using a metallic bean and a magnet. If the volume of the glass container is 1.0 L and it is at a pressure of 1.0 105 Pa and if the vacuum chamber has a volume of 2.0 L, what will the pressure be after the gas, which is to be assumed to be an ideal gas, is released into the vacuum chamber and the temperature has returned to its original value? (Note that the glass container remains part of the system.)
A) 33 kPa B) 50 kPa C) 200 kPa D) 300 kPa

Question 2

A ray in glass is incident onto a water-glass interface, at an angle of incidence equal to half the critical angle for that interface. The indices of refraction for water and the glass are 1.33 and 1.43, respectively.

The angle that the refracted ray in the water makes with the normal is closest to: A) 37
B) 42
C) 47
D) 32
E) 27