Question

1. the specific heat capacity of copper is 3.900 j/g°c. the specific heat capacity of aluminum is 9.100 j/g°c. choose the correct statement below.

a. it takes more energy to increase the temperature of aluminum than copper.
b. aluminum has a lower heat capacity than copper.
c. it takes less energy to increase the temperature of aluminum than copper.
d. copper has a higher heat capacity than aluminum.

1. calorimetry is

a. a type of exercise
b. the process of measuring the amount of heat released or absorbed during a chemical reaction
c. the process of measuring the temperature of water
d. the study of food calories

1. we can measure the amount of thermal energy that is transferred in a system using the formula q = mcδt.

q: the amount of thermal energy transferred
m: the mass of the object or substance
c: the specific heat of the object or substance
δt: the change in temperature that occurs
in a calorimetry experiment, you combusted an entire chocolate chip muffin under a soda can that contained water.
→ the can contained 100g of water
→ the specific heat of water is 4.186 j/g°c
→ the change in temperature of the water was 20°c
→ assume there was no error in the experiment and all of the energy in the muffin was transferred to the water in the can.
how much energy in joules was in the muffin? use q = mcδt and show your work.

Explanation:

Step1: Identify values for formula

$m = 100g$, $c=4.186J/g^{\circ}C$, assume a common - sense final temperature increase, say $\Delta T = 10^{\circ}C$ (not given in the problem but needed for calculation. If we assume the water heats up to a reasonable temperature like $30^{\circ}C$ from $20^{\circ}C$).

Step2: Substitute values into formula

$Q=mc\Delta T=(100g)\times(4.186J/g^{\circ}C)\times(10^{\circ}C)$

Step3: Calculate Q

$Q = 4186J$

Specific heat capacity is the amount of energy required to raise the temperature of 1 kg of a substance by 1°C. Since the specific heat capacity of aluminum ($9.100J/g^{\circ}C$) is higher than that of copper ($3.900J/g^{\circ}C$), it takes more energy to increase the temperature of aluminum.

Calorimetry is the process of measuring the amount of heat released or absorbed during a chemical reaction or physical change.

Answer:

4186J

For the multiple - choice questions:
6.