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3 years ago

Select the correct collision theory explanation for changing the rate of the given chemical reaction.

Chemistry

2 answers:

GarryVolchara [31]3 years ago

8 0

Explanation:

According to collision theory, more is the number of collisions between solute and solvent particles more will be the rate of reaction.

Refrigerate food to keep it from spoiling - Here particles will collide with less force as decrease in temperature will cause an increase in potential energy of particles.
Add inert water to a reaction solution - Here also particles will collide less frequently.
Compress the air/fuel mixture inside an engine cylinder with a piston - Here particles will collide more frequently as increasing the pressure will bring the molecules close to each other and thus there will be more number of collisions.
Raise the boiling point of water with a pressure cooker - Increase in temperature will also cause increase in number of collisions.
Grind a metal into a fine powder - More surface area will also provide more number of collisions.

Arturiano [62]3 years ago

8 0

Refrigerate Food to Keep it from Spoiling

- Particles collide with less force

Add inert water to a reaction solution

- Particles collide less frequently

Compress the air/fuel mixture inside an engine cylinder with a piston

- Particles collide more frequently

Raise the boiling point of water with a pressure cooker

- Particles collide with more force

Grind a metal into a fine power

- Particles collide more frequently

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In sodium chloride the ions are lined up in a __ patterns

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Random or ionic bond pattern

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What volume (in milliliters) of oxygen gas is required to react with 4.03 g of Mg at STP

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Vol.250 before its to much pressure

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3 years ago

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I want to know the steps.

Artyom0805 [142]

The answer for the following problem is described below.

Therefore the standard enthalpy of combustion is -2800 kJ

Explanation:

Given:

enthalpy of combustion of glucose(Δ $H_{f}$ of $C_{6}H_{12} O_{6}$ ) =-1275.0

enthalpy of combustion of oxygen(Δ $H_{f}$ of $O_{2}$ ) = zero

enthalpy of combustion of carbon dioxide(Δ $H_{f}$ of $CO_{2}$ ) = -393.5

enthalpy of combustion of water(Δ $H_{f}$ of $H_{2} O$ ) = -285.8

To solve :

standard enthalpy of combustion

We know;

Δ $H_{f}$ = ∈Δ $H_{f}$ (products) - ∈Δ $H_{f}$ (reactants)

$C_{6}H_{12} O_{6}$ (s) +6 $O_{2}$ (g) → 6 $CO_{2}$ (g)+ 6 $H_{2} O$ (l)

Δ $H_{f}$ = [6 (-393.5) + 6(-285.8)] - [6 (0) + (-1275)]

Δ $H_{f}$ = [6 (-393.5) + 6(-285.8)] - [0 - 1275]

Δ $H_{f}$ = 6 (-393.5) + 6(-285.8) - 0 + 1275

Δ $H_{f}$ = -2361 - 1714 - 0 + 1275

Δ $H_{f}$ =-2800 kJ

Therefore the standard enthalpy of combustion is -2800 kJ

7 0

3 years ago

Compare 1 mole of H2, 1 mole of O2, and 1 mole of F2. (a) Which has the largest number of molecules? Explain why. (b) Which has

AURORKA [14]

a) Answer:

Number of molecules in 1 mole

Explanation:

a) Whether we take any of the substance among all three of the given substances they will have the same number of molecules in 1 mole of the substance is considered and the value for this will be $6.023 x 10^23$

b) Answer:

In the given question mass of the substance which is greatest is asked for one mole and we also know that mass of one mole is given by molar mass.

Explanation:

b) It is known that $31.98g/mol$ is the molar mass for oxygen which is greater than that of hydrogen while fluorine has a molar mass of $38.0 g/mol$ which on comparison shows that, it is the highest amongst all three.

3 0

3 years ago

Laura has 3 beakers. Each contain 200cm3 of colourless liquid. Describe how Laura could determine which beakers contain pure wat

vova2212 [387]

Answer:

Laura can look for a transparent and translucent liquid and hence determine which beaker has water and which has solution

Explanation:

Pure water is a compound that is transparent in color. However, a solution is a liquid mixture comprising of a solvent or a solute. The atoms of solute occupy space between the atoms of solvent and hence are said to dissolve in it. Water can be a solvent.

Thus, if the beaker has a transparent liquid in it, then it would be pure water while a beaker having a translucent liquid, then it would be a solution

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3 years ago