Chapter 2, Problem 69A

Interpretation Introduction

Interpretation:

Whether a Celsius thermometer can be used with a range of $-\text{10°C}\text{to}\text{110°C}$ or not needs to be determined when the soft ball stage is reached to candy mixture.

Concept introduction:

In the United States, the Fahrenheit scale is used to measure temperature. Celsius is another temperature scale used throughout the world for measuring temperature. The relation between the two scales is as follows:

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

Answer to Problem 69A

The temperature in the degree Celsius is not in an ideal range $\left(113°\text{C}\right)$ and cannot be used because the maximum temperature read by the thermometer is $110°\text{C}$.

Explanation of Solution

Fahrenheit in the United States, the Fahrenheit scale and Celsius scale are used to measure temperature. To convert the degrees Celsius $\left(°\text{C}\right)$ to degree Fahrenheit $\left(\text{°F}\right)$, use the following equation as:

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

The Fahrenheit temperature $\left(\text{236°F}\right)$ can be converted to degree Celsius as:

$\begin{array}{c}°\text{C}=\left(°\text{F}-32\right)\times \frac{5}{9}\\ =\left(236-32\right)\times \frac{5}{9}\\ =204\times \frac{5}{9}\\ =113°\text{C}\end{array}$

Hence, temperature in the degree Celsius is not in an ideal range $\left(113°\text{C}\right)$ and cannot be used because the maximum temperature read by the thermometer is $110°\text{C}$.

Conclusion

The temperature in the degree Celsius is not in an ideal range $\left(113°\text{C}\right)$ and cannot be used because the maximum temperature read by the thermometer is $110°\text{C}$.