Question

A student is planning to make an insulated lunch bag. The table shows the materials they can choose from.
Material | Specific Heat (J/g?C)
artificial wool | 1.357
cotton | 1.300
cork | 2.000
Using the specific heats in the table, which two materials would be the best materials for their lunch bag?
A. the material with the lowest specific heat
B. the material with the highest specific heat
C. the artificial wool because it has the highest specific heat
D. the cork because it takes less heat to raise its temperature
E. the cork because it takes more heat to raise its temperature
F. the cotton because it takes more heat to raise its temperature

Answer 1

you need to pick TWO

Answer 2

To determine which materials would be the best for an insulated lunch bag, we should consider that materials with higher specific heat are better insulators because they can absorb more heat without a significant increase in temperature. This property will help keep the temperature inside the lunch bag stable.

1. **Artificial Wool:** Specific Heat = 1.357 J/g°C
2. **Cotton:** Specific Heat = 1.300 J/g°C
3. **Cork:** Specific Heat = 2.000 J/g°C

Among the materials listed, **cork has the highest specific heat** at 2.000 J/g°C, which means it is the best at absorbing heat without getting hot quickly.

Therefore, the best answer is:

**E. the cork because it takes more heat to raise its temperature.**

This indicates that cork will provide the best insulation for the lunch bag.