All categories

3 years ago

What does it mean when a system or a reaction is endothermic?

2 answers:

7 0

When a chemical reaction is endothermic, it means that the energy needed to break the bonds in the reactants is greater than the energy released when all of the new bonds are formed in the product. During an endothermic reaction, the reaction will absorb energy from its surroundings.

This is the opposite of an exothermic reaction, where the reaction releases energy because the energy needed to break the bonds in the reactants is less than the energy created in the product.

ser-zykov [4K]3 years ago

4 0

It means the system absorbs energy from surrounding objects; usually, but not always, involving heat

You might be interested in

Two controlled variables of light?

Andrei [34K]

Answer:

material of the block, the shape of the block and the color of the light

Explanation:

6 0

3 years ago

A new process converts potential energy of an object to kinetic energy. Neither work nor eat is added to the system. No reaction

blagie [28]

Answer:

Change in height of the object

Explanation:

Change in height of the object

Since ,

We know potential energy can be written as mgh where

P.E. = mgh

M = mass ,

g = gravity constant

h = height

Kinetic energy can be written as 0.5 mv²

So , the Potential energy = kinetic energy

Then ,

velocity of object = √2 gh

Since g is a constant ,

Hence ,

Height of object will determine the velocity.

5 0

4 years ago

Explain the three states of matter on the basis of characteristics of particles/ molecules of matter.

Xelga [282]

Answer :

Explanation For The Three States OF Matter On the Basis OF Characteristics Of Particles / Molecules OF Matter.

<h3>Solid: </h3>

In solids the molecules are closely packed . There is a strong force of attraction between the molecules and the space between them is very small (almost negligible). The molecules are , therefore, not free to move . They merely vibrate their mean positions . This makes solids hard and difficult to compress , giving them a fixed shape and size.

<h3>Liquid : </h3>

In the case of liquids , the molecules are not closely packed. They do not attract each other as strongly as the molecules of solids. Thus, the intermolecular spaces are larger and the molecules are able to move about more freely . This makes liquid flow and take the shape of the container into which it is poured. Thus, liquids have a fixed volume but no definite shape of their own .

In the case of gases, the molecules hardly attract each other. They lie far a part from each other and the intermolecular spaces are, therefore, very large. . The intermolecular force of attraction is so weak that the molecules have great freedom of movement . As a result , gases have neither a fixed shapenor a fixed volume . They completely full up spacw available to them. They can be easily compressed as well, thus decreasing the gaps between their molecules .

Explanation :

<h3>Hope it works out !</h3>

7 0

3 years ago

What is happening in the diagram?

OlgaM077 [116]

Answer:It is a picture with a boat sailing on the water with sound waves going down to an old and sunken ship but the waves then go back up to the boat in a different angle.

Explanation:

hope it works thx

4 0

4 years ago

How does rhenium apply to real life

riadik2000 [5.3K]

Answer: Rhenium is used as an additive to tungsten- and molybdenum-based alloys to give useful properties. These alloys are used for oven filaments and x-ray machines. It is also used as an electrical contact material as it resists wear and withstands arc corrosion.

Explanation:

4 0

3 years ago