Question

The normal boiling point of water is 100.0º at 1.00 atm. The boiling point of water is measured with three thermometers at the same pressure. The result in degree Celsius for each thermometer are: Thermometer 1: 99.8, 100.3, and 99.9 Thermometer 2: 100.0, 100.5, 99.7 Thermometer 3: 99.3, 99.3, 99.4 Which thermometer has the most precise readings and which the most accurate?

Answer 1

Accuracy of a result means the experimental value is very close to the true value. The actual boiling point of water is 100°C thermometer 1 shows accurate readings.

Precise values are those experimental values which are very close. Thermometer 3 is showing precise values.