Chapter 11, Problem 11.45QP

Interpretation Introduction

Interpretation: The final pressure of the gas in atmospheres of given problem has to be

calculated.

Concept Introduction:

STP in chemistry is the short form for Standard Temperature and Pressure.  STP most usually is used when performing calculations on gases, such as gas density.

Use the combined gas law

$\frac{{\text{P}}_{\text{1}}{\text{V}}_{\text{1}}}{{\text{T}}_{\text{1}}}\text{=}\frac{{\text{P}}_{\text{2}}{\text{V}}_{\text{2}}}{{\text{T}}_{\text{2}}}$

$\begin{array}{l}\text{where,}{\text{P}}_{\text{1}}\text{,}{\text{V}}_{\text{1}}\text{,}{\text{n}}_{\text{1}}\text{,}\text{and}{\text{T}}_{\text{1}}\text{are}\text{the}\text{initial}\text{}\text{pressure,}\text{volume,and}\\ \text{temperature}\text{.}\text{And}{\text{P}}_{\text{2}}{\text{,V}}_{\text{2}}\text{and}{\text{T}}_{\text{2}}\text{are}\text{the}\text{final}\text{pressure,}\text{volume,}\text{and}\text{temperature}\text{.}\\ \text{volume}\text{remains}\text{same}\\ \text{so}\\ {\text{V}}_{\text{1}}{\text{=V}}_{\text{2}}\text{=V}\\ \text{from}\text{the}\text{above}\text{equation}\text{we}\text{can}\text{write}\\ \frac{{\text{P}}_{\text{1}}}{{\text{T}}_{\text{1}}}\text{= }\frac{{\text{P}}_{\text{2}}}{{\text{T}}_{\text{2}}}\end{array}$