1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Paladinen [302]
2 years ago
8

A student carefully drops a 9.0 g solid Zn pellet initially at 50.0°C into an insulated cup containing 30.0 g of water at 27.8°C

. The student predicts that the temperature of the water will increase after the pellet is added. Which of the following statements is the best justification for the student's prediction? (A) The metallic bonds between Zn atoms will break when the Zn is exposed to the water molecules, releasing energy that will be absorbed by the water molecules. (B) Collisions between the water molecules and the surface of the Zn pellet will result in the transfer of energy, increasing the average kinetic energy of the water molecules. (C) The strength of the hydrogen bonds between the water molecules will increase when the Zn pellet is added, decreasing the average kinetic energy of the water molecules. (D)Collisions between Zn atoms in the solid will increase in frequency when the Zn is exposed to the water molecules, resulting in the transfer of energy to the surroundings.
Chemistry
2 answers:
melisa1 [442]2 years ago
6 0

Answer:

(B) Collisions between the water molecules and the surface of the Zn pellet will result in the transfer of energy, increasing the average kinetic energy of the water molecules.

Explanation:

The question above shows a case of energy transfer and movement of molecules in the generation of heat. Which can be explained as follows:

As you can see, in the question, the solid Zn pellet has a higher temperature than water. There is a physical concept that states that when two bodies of different temperatures come into contact, there is a transfer of energy between them that seeks to equal the temperature of the two bodies. For this reason, when the Zn pellet comes into contact with water, collisions will occur between the water molecules and the surface of the Zn sediment that will result in energy transfer.

However, instead of causing the temperature balance between the water and the Zn tablet, this allows the water to get a higher temperature, because the energy transmitted by zinc increases the kinetic energy of the water molecules. In this case, these tomboys start to move very fast, generating heat.

jekas [21]2 years ago
3 0

Answer: choice B

Explanation: Heat flows from high to low. After you convert the Celsius into kelvin the Zn pellet has 323K and the water has 301K which results the transfer of the heat energy of the pallet to the water. ( you don’t have to convert, but it just make it easier) hope this helped you :)

You might be interested in
The amount of water vapor in a given volume of air is ————
xenn [34]

Answer:

Humidity is the amount of moisture (water vapor) in the air. It can be expressed as absolute humidity or relative humidity. Absolute humidity is the mass of water vapor divided by a unit volume of air (grams of water/cm3 of air).

6 0
2 years ago
Read 2 more answers
Which of the following is the most likely sign that a chemical change has happened?
Dovator [93]

Answer:

<em>The correct option is B) two liquids are mixed at room temperature and a gas forms.</em>

Explanation:

A chemical change can be described as a change which results in the formation of a new substance by the reactants. In the option B, two liquids react  to form a new product which is a gas. Hence, it is an example of chemical change.

Other options,like option D, is not a chemical change as by crushing a solid no new product is formed. Option C is also not correct because as when salt dissolves in water, no new product is made.  

4 0
3 years ago
What determines the average kinetic energy of the molecules of any gas?
alexandr402 [8]
Temperature does. :)
4 0
3 years ago
Read 2 more answers
Applying a force can make an electron shift from one atom to another causing what?
Alexus [3.1K]
Electrons in atoms can act as our charge carrier, because every electron carries a negative charge. If we can free an electron from an atom and force it to move, we can create electricity.
8 0
2 years ago
What element is being oxidized in the following redox reaction? Pb 2+(aq) + NH4 +(aq) - Pb(s) + NO3 (aq)
castortr0y [4]
The answer for your question is c.
5 0
2 years ago
Other questions:
  • Draw a structure for the product of nucleophilic substitution obtained on solvolysis of tert−butyl bromide in methanol, and arra
    11·2 answers
  • Why does the magnet disolves when is insert in hydrochloric acid
    6·1 answer
  • Dalton had the first idea of the atom true or false
    8·1 answer
  • Which of the following elements would you expect to have the highest ionization energy value, and why?
    7·2 answers
  • True or false Nitrogen - 15 has 7 neutrons
    14·1 answer
  • If you have 2.0 moles of sodium chloride (NaCl), what is its mass in grams?
    8·1 answer
  • You want to make a bracelet and have two materials: gold and silver. The bracelet needs to be eight inches long. You want to use
    14·1 answer
  • How many grams of NH3 are in 45.9
    12·1 answer
  • Name the following hydrate Pb(CIO3)4 . H2O
    10·1 answer
  • A compound with the formula C6H12 may or may not be a saturated hydrocarbon.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!