If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 286J of energy to the room?
A. iodine is located in period 5, group 17 and is classified
as a nonmetal
Group is the column, period is the raw.
The volume of the room is the product of its dimensions:
![10\times 12 \times 4 = 480\text{ m}^3](https://tex.z-dn.net/?f=10%5Ctimes%2012%20%5Ctimes%204%20%3D%20480%5Ctext%7B%20m%7D%5E3)
Now, from the equation
![d=\dfrac{m}{V}](https://tex.z-dn.net/?f=d%3D%5Cdfrac%7Bm%7D%7BV%7D)
where d is the density, m is the mass and V is the volume, we deduce
![m=dV](https://tex.z-dn.net/?f=m%3DdV)
So, multiply the density and the volume to get the mass of air in the room.
The answers would be:
C. Bubbles appear
E. The color changes
<u>If you'd like to know more, you can read on:</u>
Although your selections are indications of chemical reactions, if you are referring to only the chemical reaction that occurred in your example, then the two answers are the only choices.
A chemical reaction occurs when the reactants form a new product. Signs of a chemical reaction include change is smell, color and temperature. In some cases, precipitate forms.
It holds A. Less water than when it is warmer.