1. A pan of water is heated from 23 degrees C to 78 degrees C. What is the change in its temperature on the Kelvin and Fahrenheit scales?
A temperature difference of 1 degree in Celsius is equal to a temperature difference of 1 degree in Kelvin. Celsius and Kelvin differ only in the 0-point. So there is no need to convert to Kelvins. Just compute the difference in Celsius, and that will also be the difference in Kelvins.
If you did the conversion anyway, you still get the right answer. It’s just more work.
, so also 55 K
The same is not true for Fahrenheit. You must do the conversions.
2. The lowest outdoor temperature ever recorded
on Earth is –128.6 degrees F, recorded at Vostok Station,
3. Liquid nitrogen is used to cool substances to very low temperatures. Express the boiling point of liquid nitrogen (-195.81 °C at 1 atm of pressure) in degrees Fahrenheit and in kelvins.
4. The temperatures of one northeastern state range from 105 °F in the summer to –25 °F in the winter. Express this temperature range in degrees Celsius.
5. The normal human body temperature is 98.6 °F. A person with a fever may record 102 °F. Express these temperatures in degrees Celsius.
