Question

selecting the appropriate material to stir hot liquid
a recipe for candy requires that the liquid ingredients be
stirred constantly until the liquid reaches a temperature of
140°c. what type of spoon - wood or metal - will prevent
burns to a persons hand while stirring the hot liquid?
explain your choice.

Explanation:

Wood is a poor conductor of heat. When stirring hot liquid, heat transfer from the liquid to the hand through a wooden spoon will be slow. Metal, on the other hand, is a good conductor of heat. Heat will transfer quickly from the hot liquid to the hand through a metal spoon, increasing the risk of burns.

Answer:

Wooden spoon. Because wood is a poor heat - conductor, it will prevent burns as heat transfer from the hot liquid to the hand is slow. A metal spoon, being a good heat - conductor, will transfer heat quickly from the hot liquid to the hand, increasing the risk of burns.