Liquid nitrogen is used to cool substances to very low temperatures. Express the boiling point of liquid nitrogen (77.34 K at 1 atm of pres- sure) in degrees Celsius and in degrees Fahrenheit.

Answer 1

To convert the boiling point of liquid nitrogen from Kelvin to degrees Celsius and degrees Fahrenheit, we use the following formulas:

1. Kelvin to Celsius: \[ °C = K - 273.15 \]

2. Celsius to Fahrenheit: \[ °F = (°C \times \frac{9}{5}) + 32 \]

Step 1: Convert Kelvin to Celsius

Given the boiling point of liquid nitrogen is 77.34 K: \[ °C = 77.34 - 273.15 = -195.81 °C \]

Step 2: Convert Celsius to Fahrenheit

Now, convert -195.81 °C to Fahrenheit: \[ °F = (-195.81 \times \frac{9}{5}) + 32 \] \[ °F = (-351.458) + 32 = -319.458 °F \]

Final Results

• Boiling Point of Liquid Nitrogen:
  • In Celsius: -195.81 °C
  • In Fahrenheit: -319.46 °F (rounded to two decimal places)