Which SI unit measures thermodynamic temperature?

Which SI unit measures thermodynamic temperature?

• A. Ampere (A)
• B. Kelvin (K)
• C. Candela (cd)
• D. Mole (mol)

Answer: (B)

The main idea is that thermodynamic temperature is measured using the Kelvin scale, the SI unit for temperature. Kelvin defines zero at absolute zero—the point where particle motion is minimal—and is used in scientific calculations because it directly reflects thermal energy and fits thermodynamic equations like PV = nRT, where temperature is in kelvin. One kelvin has the same size as one degree Celsius, so you can convert by adding 273.15 to Celsius temperatures. The other units correspond to different quantities: ampere for electric current, candela for luminous intensity, and mole for amount of substance.

The main idea is that thermodynamic temperature is measured using the Kelvin scale, the SI unit for temperature. Kelvin defines zero at absolute zero—the point where particle motion is minimal—and is used in scientific calculations because it directly reflects thermal energy and fits thermodynamic equations like PV = nRT, where temperature is in kelvin. One kelvin has the same size as one degree Celsius, so you can convert by adding 273.15 to Celsius temperatures. The other units correspond to different quantities: ampere for electric current, candela for luminous intensity, and mole for amount of substance.