Chapter 9: Q5 E (page 506)
A typical barometric pressure in Denver, Colorado, is 615mm Hg. What is this pressure in atmospheres and kilopascals?
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Question:A 1-L sample of CO initially at STP is heated to 5460C, and its volume is increased to 2-L. (a) What effect do these changes have on the number of collisions of the molecules of the gas per unit area of the container wall? (b) What is the effect on the average kinetic energy of the molecules? (c) What is the effect on the root mean square speed of the molecules?
What is the molar mass of a gas if \(0.0494\;{\rm{g}}\) of the gas occupies a volume of \(0.100\;{\rm{L}}\) at a temperature \({26^\circ }{\rm{C}}\)and a pressure of \({\bf{307}}\) torr?
Consider this question: What is the molecular formula of a compound that contains \(39\% {\rm{C}}\,\,,45\% \;{\rm{N}}\), and \(16\% \,{\rm{H}}\) if \(0.157\;{\rm{g}}\)of the compound occupies \(125\;{\rm{mL}}\) with a pressure of \(99.5{\rm{kPa}}\)at \({22^\circ }{\rm{C}}\)?
(a) Outline the steps necessary to answer the question;
(b) Answer the question.
The effect of chlorofluorocarbons (such as \({\rm{CC}}{{\rm{l}}_2}\;{{\rm{F}}_2}\) ) on the depletion of the ozone layer is well known. The use of substitutes, such as \({\rm{C}}{{\rm{H}}_3}{\rm{C}}{{\rm{H}}_2}\;{\rm{F}}(g)\), for the chlorofluorocarbons, has largely corrected the problem. Calculate the volume occupied by \(10.0\;{\rm{g}}\)of each of these compounds at STP:
(a) \({\rm{CC}}{{\rm{l}}_2}\;{{\rm{F}}_2}(g)\)
(b) \({\rm{C}}{{\rm{H}}_3}{\rm{C}}{{\rm{H}}_2}\;{\rm{F}}(g)\)
Question: A balloon filled with helium gas is found to take6hours to deflate to50%of its original volume. How long will it take for an identical balloon filled with the same volume of hydrogen gas (instead of helium) to decrease its volume by 50%?
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