Which heat transfer process explains why a metal spoon in hot soup gets warm?

Which heat transfer process explains why a metal spoon in hot soup gets warm?

• A. Conduction
• B. Convection
• C. Radiation
• D. Evaporation

Answer: (A)

Heat travels to the spoon mainly through conduction, which is heat transfer by direct contact. When the hot soup touches the cooler spoon, the vibrating particles in the soup collide with the spoon’s particles and transfer some of their energy. Metals like the spoon are good conductors, so this energy moves quickly along the spoon, warming it until temperatures equalize. While radiation from the soup and convection currents in the liquid can play a smaller role, the key process warming the spoon is conduction. Evaporation, by contrast, involves liquid turning into vapor and would cool the liquid rather than make the spoon warmer.

Heat travels to the spoon mainly through conduction, which is heat transfer by direct contact. When the hot soup touches the cooler spoon, the vibrating particles in the soup collide with the spoon’s particles and transfer some of their energy. Metals like the spoon are good conductors, so this energy moves quickly along the spoon, warming it until temperatures equalize. While radiation from the soup and convection currents in the liquid can play a smaller role, the key process warming the spoon is conduction. Evaporation, by contrast, involves liquid turning into vapor and would cool the liquid rather than make the spoon warmer.