All categories

3 years ago

How does the potential-energy diagram for a reaction indicate whether the reaction is endothermic or exothermic?

Chemistry

2 answers:

AnnZ [28]3 years ago

5 0

Answer:

I am pretty sure it is An exothermic reaction has reactants that are lower in energy than products because energy is released to form the products.

Explanation:

luda_lava [24]3 years ago

5 0

Answer:

A: An endothermic reaction has reactants that are lower in energy than products because energy is absorbed to form the products.

Explanation:

I just did this and got it right

You might be interested in

2) Motion can be described through a change in _____.

Triss [41]

Answer: average speed

Explanation: describes speed of motion when speed is changing.

7 0

3 years ago

Read 2 more answers

Chemistry omg need help plz I need plz. I real badly at it and try to get better but plz help me

Rufina [12.5K]

We all struggle in some subjects, you do badly when you don't try, and sometimes we try and can't get the answer, I'll help with that. :)

The first answer is CO2(g), CO2 is a gas, and all gas have... 4) No definite shape, no definite volume.

A piece of ice, a block of wood, and a ceramic cup are solids. They have shapes that do not change and volumes that can be measured. Any matter that is a solid has a definite shape and a definite volume.

A liquid takes the shape of what holds it, besides a flat surface, which will just evidently, take the shape of a flat surface. A liquid has a definite volume, because the volume of a liquid is constant because forces of attraction keep the particles loosely together.

Gases attempt to fill a container of any shape or size. Therefore, it has no definite shape.
There are forces of attraction among the particles in all matter, therefore, it has no definite volume.

The second question might become easier with the explanation above. A liquid has a definite volume because the forces of attraction are loosely together! Therefore, it has a definite volume, but it will take the shape of it's container.

This means... Yes! 2) It retains its original volume but changes shape.

This one is easy. To convert one gram of a solid at its normal heating point to a liquid at the same temperature, is the 1) Heat of Vaporization.

Heat of Vaporization is the amount of heat energy required to convert one gram of a substance from a liquid to a gas.

The third question, the molecules for H20, in a solid phase are always in an geometric and arranged pattern.

Most solids are arranged in geometric and arranged patterns, and since H20 is not in its indefinitely shaped liquid phase, it has a definite shape and thus, retains a repeating (geometric) pattern.

(Note- Some solids like wax or rubber do not have an arranged or geometric pattern.)

The “average of a kinetic energy” is defined as the vitality of movement of particles of a framework.

Or in simpler terms, “energy motion”.

So when temperature increases, the average kinetic energy of a molecule(s) 1) increases.

‎

7 0

4 years ago

Which of the following best describe arrangement of particles in a gas?

Maslowich

Answer:

last one

Explanation:

makes the most sense

8 0

3 years ago

List all possible oxidation numbers for the elements. 21. Al

Alex73 [517]

Answer:

21. Al (Aluminium)

+3 (most common), -1, -2, +1, +2

22. Bi (Bismuth)

+3 (most common), -3, -2, -1, +1, +2, +4, +5

23. Ni (Nickel)

+2 (most common), -2, -1, 0,+1, +3, +4

24. Xe (Xenon)

0 (most common), +1, +2, +4, +6, +8

25. Pb (Lead)

+2 (most common), +4 (most common), -4, -2, -1, +1, +3

Explanation:

Now we proceed to present the answers for each element:

21. Al (Aluminium)

+3 (most common), -1, -2, +1, +2

22. Bi (Bismuth)

+3 (most common), -3, -2, -1, +1, +2, +4, +5

23. Ni (Nickel)

+2 (most common), -2, -1, 0,+1, +3, +4

24. Xe (Xenon)

0 (most common), +1, +2, +4, +6, +8

25. Pb (Lead)

+2 (most common), +4 (most common), -4, -2, -1, +1, +3

7 0

3 years ago

What is the apparatus used to carry out paper chromatography?

SashulF [63]

Answer:

The apparatus used for paper chromatography are strip of spotted whatman filter paper, Organic solvents, paper strip, trough for solvent, Hook to hold the chromatography paper.

Explanation:

5 0

3 years ago

Read 2 more answers