A student is investigating how different materials affect heat transfer. The student places an ice cube on two blocks, Block A and Block B, which are made of different materials, and observes how long it takes each cube to melt. The setup and data are shown.
Two blocks, labeled A and B, with an ice cube placed on top of each block.
Block Mass of the block (g) Initial Temperature of the block (°C) Initial Temperature of the ice cube placed on the block (°C) Time it takes each ice cube to melt on the block
Block A 66 23 -10 45 minutes
Block B 382 36 -10 10 minutes
Which two statements explain why the ice cube melted faster on Block B?
A.
Block B has a smaller mass than Block A.
B.
Block B transfers heat more slowly than Block A.
C.
Block B’s ice cube was initially warmer than Block A’s.
D.
Block B’s particles have more kinetic energy than Block A’s.
E.
Block B is a better conductor of thermal energy than Block A.
1 answer
The two statements that explain why the ice cube melted faster on Block B are:
D. Block B’s particles have more kinetic energy than Block A’s.
This indicates that the particles in Block B are vibrating more, which contributes to faster heat transfer.
E. Block B is a better conductor of thermal energy than Block A.
A better conductor facilitates more efficient transfer of heat to the ice cube, contributing to faster melting.
So the correct choices are D and E.
