Chapter 5.4, Problem 5.11BFP

Interpretation Introduction

Interpretation:

The partial pressure and mass of ${\text{O}}_{\text{2}}$ produced upon heating a sample of ${\text{KClO}}_{\text{3}}$ are to be calculated.

Concept introduction:

Ideal gas law equation is as follows:

$PV=nRT$        (1)

Here,

$P$ is the pressure of the gas.

$V$ is the volume occupied by gas.

$n$ is the number of moles of gas.

$T$ is the temperature in Kelvin.

$R$ is the universal gas constant.

Rearrange equation (1) for $n$ as follows:

$n=\frac{PV}{RT}$        (2)

The formula to calculate number of moles is as follows:

$n=\frac{\text{weight}\left(m\right)}{\text{molecular}\text{weight}\left(M\right)}$        (3)

Conversion factor to convert $\text{torr}$ to $\text{atm}$ is as follows:

$\text{760}\text{torr}=\text{1}\text{atm}$

Conversion factor to convert $\text{mL}$ to $\text{L}$ is as follows:

$1\text{mL}={10}^{-3}\text{L}$

The conversion factor to convert $°\text{C}$ to Kelvin is as follows:

$T\left(\text{K}\right)=T\left(\text{°C}\right)+273.15$        (4)

The partial pressure of water is $17.5\text{torr}$ at $20°\text{C}$.