Answer :The specific heat of aluminium tells you the amount of energy needed to increase the temperature of 1 g of aluminium by 1∘C . You can thus say that in order to increase the temperature of 1 g of aluminium by 1∘C , you need to supply it with 0.214 cal of heat.
Explanation:
Answer:
[tex]\boxed {\boxed {\sf 1080 \ Joules}}[/tex]
Explanation:
We are asked to calculate the energy needed to raise the temperature of 80 grams of aluminum by 15 degrees Celsius.
We are given the mass and change in temperature, so we will use the following formula:
[tex]q=mc\Delta T[/tex]
The mass is 80 grams, the change in temperature is 15 degrees Celsius, and aluminum's specific heat capacity is 0.9 Joules per gram degree Celsius.
Substitute the values into the formula.
[tex]q= (80 \ g)(0.9 \ J/g \textdegree C)(15 \textdegree C)[/tex]
Multiply the first two numbers together. The units of grams will cancel out.
[tex]q= (80 \ g * 0.9 \ J/g \textdegree C)(15 \textdegree C)[/tex]
[tex]q= (80 * 0.9 \ J/\textdegree C)(15 \textdegree C)[/tex]
[tex]q= 72 \ J / \textdegree C (15 \textdegree C)[/tex]
Multiply again. This time, the units of degrees Celsius cancel.
[tex]q= 72 \ J * 15[/tex]
[tex]q= 1080 \ J[/tex]
Raising the temperature of 80 grams of aluminum by 15 degrees Celsius requires 1080 Joules of energy.
