Question

The diagram below shows a Bunsen burner heating a beaker of water on a beaker stand. The arrows represent the transfer of heat energy in the water. Which process is primarily responsible for the transfer of heat indicated by the arrows in the beaker of water?

Answer 1

Explanation:

When two objects of different temperature are in contact with each other then heat transfers from hotter object to colder object and this process is known as conduction.

Whereas when heat is transferred to a fluid (liquid or gas) through currents then hotter fluid (less density) rises at the top and cooler fluid (high density) sinks to the bottom. This process is known as convection.

Therefore, when heat is transferred from burner to the beaker (since they are in direct contact) then conduction process is occurring. On the other hand, transfer of heat from beaker to the water is taking place due to convection process.

Thus, we can conclude that primarily convection process is responsible for the transfer of heat indicated by the arrows in the beaker of water.

 

Answer 2

There's no diagram attached, but diffusion of heat within the water (which i think is what the question's asking) would be due to convection currents.