Question

e) none of the above

1. the boiling point of water is

(1) 212°f (2) 0°c (3) 373 k
a) 1 and 3 only
b) 1 and 2 only
c) 2 and 3 only
d) all of 1, 2, and 3
e) none of 1, 2, and 3

1. what is the value of 27°c on the fahrenheit temperature scale?

a) -6.8
b) 106
c) 81

Explanation:

Question 26

• Recall the boiling point of water: at standard pressure, boiling point of water is \( 100^\circ\text{C} \), \( 212^\circ\text{F} \), and \( 373\,\text{K} \) (since \( K = ^\circ\text{C}+ 273.15 \), so \( 100 + 273.15=373.15\approx373\,\text{K} \)).
• Option (1) is \( 212^\circ\text{F} \) (correct), option (2) is \( 0^\circ\text{C} \) (freezing point of water, incorrect), option (3) is \( 373\,\text{K} \) (correct). So only 1 and 3 are correct.

Step 1: Recall the conversion formula

The formula to convert Celsius to Fahrenheit is \( ^\circ\text{F}=\frac{9}{5}\times ^\circ\text{C}+ 32 \).

Step 2: Substitute \( ^\circ\text{C} = 27 \)

Substitute \( ^\circ\text{C}=27 \) into the formula: \( ^\circ\text{F}=\frac{9}{5}\times27 + 32 \).
First, calculate \( \frac{9}{5}\times27=\frac{243}{5} = 48.6 \).
Then, add 32: \( 48.6+32 = 80.6\approx81 \) (assuming the option C is 81, as the visible part shows C) 81).

Answer:

A) 1 and 3 only

Question 27