All categories

3 years ago

How does positive catalyst increase the rate of chemical reaction?

Chemistry

1 answer:

KATRIN_1 [288]3 years ago

6 0

Answer:

A catalyst speeds up a chemical reaction, without being consumed by the reaction. It increases the reaction rate by lowering the activation energy for a reaction. ... Remember that with a catalyst, the average kinetic energy of the molecules remains the same but the required energy decreases

Explanation:

...

hope that is helpful

You might be interested in

How many grams of ice at -12.1 ∘C can be completely converted to liquid at 15.2 ∘C if the available heat for this process is 4.4

ra1l [238]

Answer:

The mass of ice is 1,06 kg

Explanation:

Formula for calorimetry: Q = m . C . ΔT

Formula for phase transition, with latent heat: Q = L . m

m . C . ΔT + L . m + m . C . ΔT = 4490 kJ

m . 2,01 J/g°C (0° - (-12,1°C) + 334 J/g . m + m . 4,186 J/g°C . (15,2°C - 0°C)

Our unknown value is mass

You should look for latent heat of Ice and of course, specific heat of water.

Those are constant and they are known.

As the units are in J, and the heat for the process is in Kj we have to convert the final number into J

4490kJ . 1000 = 449000 J

m. 2,01 J/g°C (0°-(-12,1°C) + 334 J/g .m +m .4,186 J/g°C .(15,2°C - 0°C) = 449000 J

m. 24,321 J/g + 334 J/g .m + 63,62 J/g . m = 449000 J

421,94 J/g . m = 449000 J

m = 449000 J /421,94 g/J = 1064,1 g ---->1,06 kg

8 0

2 years ago

A particular sample of air is 2.5% water vapor express the concentration of water vapor in parts per million

Inessa05 [86]

Answer:

25000 ppm

Explanation:

Parts Per Million is defined as the number of parts of a solute per one million parts of a solution.

ppm = (Weight of Solute / Weight of Solution) × 10⁶ ---(1)

Let us suppose that the air (solution) weights 100 grams, then 2.5 % of water vapors will have following mass,

Mass of Vapors g / 100 g × 100 = 2.5

Or,

Mass of Vapors = 2.5 × 100 / 100

Mass of Vapors = 2.5 g

Hence, mass of water vapors is 2.5 g.

Now, putting mass of water vapors and air in eq. 1,

ppm = (2.5 / 100) × 10⁶

ppm = 25000

7 0

3 years ago

Giving brainliest if correct!! please help someone out?

Stels [109]

Answer:

protons: 36

neutrons:48

electrons:36

Explanation:

the number of protons in an element is = to the atomic # (36)

the number of neutrons is the atomic mass - atomic # (84-36=48)

In a neutral charged element the # of protons = # of electrons

5 0

3 years ago

WILL GIVE BRAINLIEST

dedylja [7]

Answer:

In order to be able to solve this problem, you will need to know the value of water's specific heat, which is listed as

c=4.18Jg∘C

Now, let's assume that you don't know the equation that allows you to plug in your values and find how much heat would be needed to heat that much water by that many degrees Celsius.

Take a look at the specific heat of water. As you know, a substance's specific heat tells you how much heat is needed in order to increase the temperature of 1 g of that substance by 1∘C.

In water's case, you need to provide 4.18 J of heat per gram of water to increase its temperature by 1∘C.

What if you wanted to increase the temperature of 1 g of water by 2∘C ?

This will account for increasing the temperature of the first gram of the sample by n∘C, of the the second gramby n∘C, of the third gram by n∘C, and so on until you reach m grams of water.

And there you have it. The equation that describes all this will thus be

q=m⋅c⋅ΔT , where

q - heat absorbed

m - the mass of the sample

c - the specific heat of the substance

ΔT - the change in temperature, defined as final temperature minus initial temperature

In your case, you will have

q=100.0g⋅4.18Jg∘C⋅(50.0−25.0)∘C

q=10,450 J

4 0

3 years ago

What is the product of a force and the time during which the force acts

ELEN [110]

Impulse is the product of a force and the time during which that force acts on a body.

7 0

3 years ago

How does positive catalyst increase the rate of chemical reaction?​

How does positive catalyst increase the rate of chemical reaction?