Which option matches the boiling point of water in Kelvin as 373.15?

Which option matches the boiling point of water in Kelvin as 373.15?

• A. 373.15
• B. 273.15
• C. 671.67
• D. 212

Answer: (A)

The essential idea is converting the boiling point of water to Kelvin. Kelvin is Celsius plus 273.15, so the boiling point of water at standard pressure, which is 100°C, becomes 100 + 273.15 = 373.15 K. Among the numbers given, 373.15 K is the direct Kelvin value for that boiling point. The other numbers correspond to different references: 273.15 K is 0°C (the freezing point); 671.67 K is about 398.5°C (much hotter than the standard boiling point); 212 is the Fahrenheit value for the boiling point, not a Kelvin measurement. So 373.15 K is the correct Kelvin value.

The essential idea is converting the boiling point of water to Kelvin. Kelvin is Celsius plus 273.15, so the boiling point of water at standard pressure, which is 100°C, becomes 100 + 273.15 = 373.15 K. Among the numbers given, 373.15 K is the direct Kelvin value for that boiling point.

The other numbers correspond to different references: 273.15 K is 0°C (the freezing point); 671.67 K is about 398.5°C (much hotter than the standard boiling point); 212 is the Fahrenheit value for the boiling point, not a Kelvin measurement. So 373.15 K is the correct Kelvin value.