Question

1. the specific - heat capacity of copper is 0.39 j/g°c. the specific - heat capacity of aluminum is 0.90 j/g°c. choose the correct statement below.

a. it takes more energy to increase the temperature of 1 g of aluminum than 1 g of copper.
b. aluminum has a lower heat capacity than copper.
c. it takes less energy to increase the temperature of 1 g of aluminum than 1 g of copper.
d. copper has a higher heat capacity than aluminum.

1. calorimetry is:

a. a form of chemistry.
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 heat engines.

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

a. the amount of thermal energy transferred.
b. the mass of the object or substance.
c. the specific heat of the object or substance.
d. the change in temperature that occurs.
in a calorimetry experiment, you conducted an experiment.

• the can contained 100 g of water.
• the specific heat of water is 4.184 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 the values

We are given that $m = 100\ g$ (mass of water), $c=4.184\ J/g^{\circ}C$ (specific - heat of water) and $\Delta T = 20^{\circ}C$ (change in temperature).

Step2: Apply the heat - energy formula

The formula for heat energy is $Q=mc\Delta T$. Substitute the given values into the formula: $Q=(100\ g)\times(4.184\ J/g^{\circ}C)\times(20^{\circ}C)$.

Step3: Calculate the result

$Q = 100\times4.184\times20\ J=8368\ J$.

Answer:

$8368\ J$