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Aleksandr [31]
4 years ago
11

The addition of a catalyst to a chemical reaction provides an alternate pathway that

Chemistry
2 answers:
Degger [83]4 years ago
4 0
<span>The addition of a catalyst to a chemical reaction provides an alternate pathway that c</span>atalysts lowers the activation energy.
Vanyuwa [196]4 years ago
4 0

Answer: has lower activation energy

Explanation:

A catalyst is a substance which increases the rate of a reaction by taking the reaction through a different path which involves lower activation energy and thus more molecules can cross the energy barrier and convert to products.

Activation energy is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.

The catalyst itself does not take part in the chemical reaction and is regenerated as such at the end.

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During a spontaneous chemical reaction, it is found that ΔSsys is less than 0. This means that Group of answer choices ΔSsurr is
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Answer:

The correct option is: ΔSsurr is greater than 0 and its magnitude is greater than ΔSsys.  

Explanation:

For a <u>chemical reaction to be spontaneous, the change in the</u> <u>Gibbs free energy should be negative (ΔG = -ve).</u>

At constant temperature (T) and pressure, the Gibbs free energy is given by the equation: \Delta G_{system} = \Delta H_{system} - T\Delta S_{system}

Here, \Delta H_{system} is the enthalpy change and \Delta S_{system} is the entropy change of the system.

Also, <u>according to the second law of thermodynamics</u>, <u>for a spontaneous process, the total entropy</u>, \Delta S_{universe} = \Delta S_{system} + \Delta S_{surrounding} > 0

Therefore, <u>for a reaction to be spontaneous</u>, if \Delta S_{system} is less than 0 or negative; then <u>\Delta S_{surrounding} should be greater than 0 or positive. </u>Also, \Delta S_{surrounding} > \Delta S_{system}.

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3 years ago
What is the number of Co2 in a 220 gram
skelet666 [1.2K]
I believe that the number for Co2 in 220 grams is 5
5 0
3 years ago
I want someone he is good in chemistry
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Answer:

<h2>.I can help you.....</h2>

Explanation:

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8 0
3 years ago
What is the percentage composition of each element in hydrogen peroxide, H2O2?
Degger [83]

Answer:

The percentage composition of each element in H2O2 is 5.88% H and 94.12% O (Option D).

Explanation:

Step 1: Data given

Molar mass of H = 1.0 g/mol

Molar mass of O = 16 g/mol

Molar mass of H2O2 = 2*1.0 + 2*16 = 34.0 g/mol

Step 2: Calculate % hydrogen

% Hydrogen = ((2*1.0) / 34.0) * 100 %

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Step 3: Calculate % oxygen

% Oxygen = ((2*16)/34)

% oxygen = 94.12 %

We can control this by the following equation

100 % - 5.88 % = 94.12 %

The percentage composition of each element in H2O2 is 5.88% H and 94.12% O (Option D).

8 0
3 years ago
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Is soda homogeneous or heterogeneous? ​
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Answer:

Thecinically it is both because and  an un opened bottle of soda is homogeneous and an opened bottle of soda is herterogeneous. I hope this helps please reward branlist.

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