Chapter 1, Problem 1.81P

Interpretation Introduction

Interpretation:

The freezing and boiling points of water in $°\text{X}$ are to be calculated.

Concept introduction:

The temperature of an object is the measure of the coldness and hotness of the object relative to another object. The S.I unit of temperature is Kelvin $\left(\text{K}\right)$. The other units of temperature are degree Celcius $\left(\text{°C}\right)$ and Fahrenheit $\left(°\text{F}\right)$.

The first is the Fahrenheit $\left(\text{°F}\right)$ scale common in the United States. On this scale, the freezing point of water is $\text{32 °F}$ and the boiling point is $\text{212 °F}$. The room temperature is around $72°\text{F}$ on this scale.

The other scale common in countries apart from the United States is the Celsius $\left(\text{°C}\right)$ scale. On this scale, the freezing point of water is $\text{0 °C}$ and the boiling point of water is $\text{100 °C}$. The room temperature is around $\text{22 °C}$.

The third scale is the Kelvin scale which is also known as Absolute scale.

The conversion factor to convert temperature from degree Celsius to Kelvin is,

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

The conversion factor to convert temperature from degree Celsius to Fahrenheit is,

  $T\left(\text{°F}\right)=\frac{9}{5}T\left(°\text{C}\right)+32$