Question

1. the temperature of boiling water is

(a) ( 100 ^ { circ } mathrm { c } )
(b) ( 212 ^ { circ } mathrm { f } )
(c) ( 70.8 ^ { circ } mathrm { c } )
(d) none of the above
note: there may be more than one correct answer

1. absolute zero corresponds to a temperature of

(a) ( 0 ^ { circ } k )
(b) ( - 273 ^ { circ } mathrm { c } )
(c) ( 373 ^ { circ } mathrm { f } )
(d) ( 400 ^ { circ } mathrm { c } )

Explanation:

Question 8

• At standard atmospheric pressure (\(1\ atm\)), the boiling point of water is \(100^{\circ}C\).
• To convert Celsius to Fahrenheit, we use the formula \(F=\frac{9}{5}C + 32\). When \(C = 100\), \(F=\frac{9}{5}\times100+32=180 + 32=212^{\circ}F\).
• \(70.8^{\circ}C\) is not the boiling point of water at standard atmospheric pressure.

• Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance.
• In the Kelvin scale, absolute zero is defined as \(0^{\circ}K\).
• To convert Kelvin to Celsius, we use the formula \(C=K - 273.15\). When \(K = 0\), \(C=- 273.15^{\circ}C\approx - 273^{\circ}C\).
• \(373^{\circ}F\) and \(400^{\circ}C\) are not equivalent to absolute zero.

Answer:

A. \(100^{\circ}C\), B. \(212^{\circ}F\)

Question 9