1. You place a cold metal spoon in a foam cup of hot chocolate. Keep this scenario in mind. Write sentences that correctly use the following terms.
a) heat absorption b) specific heat capacity c) insulation d)R-value e)vacuum bottle
Science Connect 1 textbook
First, it will be helpful to really understand what each of these terms mean.
Heat absorption: Heat absorption is the movement of heat from one object to another. This occurs by radiation, convection or conduction.
Specific heat capacity: Specific heat capacity is a measure of how much heat is required to raise a particular object's temperature by one degree Celsius.
Insulation: A class of materials which do not transfer heat easily.
R-value: An R-value is a measure of how well a material insulates. A material with a high R-value has low thermal conductivity.
Vacuum bottle: A vacuum bottle is more commonly known as a thermos. It is essentially a bottle within a bottle. The air is removed from the space in between the two bottles, forming a vacuum.
Now, in regards to the scenario of the cold metal spoon placed in the foam cup filled with hot chocolate: Heat absorption will always take place when two or more objects at different temperatures are in contact with one another. In this case, the hot chocolate is in contact with the foam cup and the spoon, and the foam cup is in contact with the environment. The foam cup has a much higher R-value than the spoon. This means the specific heat capacity of the spoon is lower than that of the foam cup. The hot chocolate will warm the spoon while the foam cup insulates the hot chocolate from the environment. More insulation could be provided by transferring the hot chocolate to a vacuum bottle.