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2 years ago

Using complete sentences, explain how to predict the products and balance the reaction for the combustion of butane.

Chemistry

1 answer:

Tanzania [10]2 years ago

8 0

Answer:

2C₄H₁₀ + 13O₂ ⇒ 8CO₂ + 10H2₀

<h2>What is combustion? </h2>

The reaction of a substance with oxygen, producing one or more oxides, heat and light.

Butane (C₄H₁₀) is a hydrocarbon ( The name used for a hydrocarbon with four carbon atoms and only single bonds.) Butane consists of carbon and hydrogen and thus when it combust, it produces carbon dioxide and water.

2C₄H₁₀ + 13O₂ ⇒ 8CO₂ + 10H2₀

The following chemical equation follow the law of conservation of mass.

The law of conservation of mass states that in a closed system, mass is neither created nor destroyed during a chemical or physical reaction. The law of conservation of mass is applied whenever you balance a <u>chemical equation</u>. It is also applicable to stoichiometry. On the product side, the number of atoms must match the total of atoms on the product side. As a result, the equation must be balanced.

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If an ice cube weighing 25.0 g with an initial

riadik2000 [5.3K]

Answer:

∘

Explanation:

As far as solving this problem goes, it is very important that you do not forget to account for the phase change underwent by the solid water at

∘

to liquid at

∘

The heat needed to melt the solid at its melting point will come from the warmer water sample. This means that you have

−

(

)

, where

- the heat absorbed by the solid at

∘

- the heat absorbed by the liquid at

∘

- the heat lost by the warmer water sample

The two equations that you will use are

⋅

, where

- heat absorbed/lost

- the mass of the sample

- the specific heat of water, equal to

4.18

∘

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

and

⋅

fus

, where

- heat absorbed

- the number of moles of water

fus

- the molar heat of fusion of water, equal to

6.01 kJ/mol

Use water's molar mass to find how many moles of water you have in the

100.0-g

sample

100.0

⋅

1 mole H

18.015

5.551 moles H

So, how much heat is needed to allow the sample to go from solid at

∘

to liquid at

∘

5.551

moles

⋅

6.01

mole

33.36 kJ

This means that equation

(

)

becomes

33.36 kJ

−

The minus sign for

is used because heat lost carries a negative sign.

So, if

is the final temperature of the water, you can say that

33.36 kJ

sample

⋅

sample

−

water

⋅

water

More specifically, you have

33.36 kJ

100.0

⋅

4.18

∘

⋅

(

−

)

∘

−

650

⋅

4.18

∘

⋅

(

−

)

∘

33.36 kJ

418 J

⋅

(

−

)

−

2717 J

⋅

(

−

)

Convert the joules to kilojoules to get

33.36

0.418

⋅

−

2.717

⋅

(

−

)

This is equivalent to

0.418

⋅

2.717

⋅

67.925

−

33.36

34.565

0.418

2.717

11.026

∘

Rounded to two sig figs, the number of sig figs you have for the mass of warmer water, the answer will be

∘

Explanation:

3 0

3 years ago

Why does water boils at a higher temperature than a non-polar solvent like ether?

trapecia [35]

<span>a large amount of energy is released when water dissociates into oppositely charged ions.</span>

8 0

3 years ago

Enter your answer in the provided box.

Lina20 [59]

Answer:

5.06atm

Explanation:

Using the combined gas law equation;

P1V1/T1 = P2V2/T2

Where;

P1 = initial pressure (atm)

P2 = final pressure (atm)

V1 = initial volume (Litres)

V2 = final volume (Litres)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

P1 = 1.34 atm

P2 = ?

V1 = 5.48 L

V2 = 1.32 L

T1 = 61 °C = 61 + 273 = 334K

T2 = 31 °C = 31 + 273 = 304K

Using P1V1/T1 = P2V2/T2

1.34 × 5.48/334 = P2 × 1.32/304

7.34/334 = 1.32P2/304

Cross multiply

334 × 1.32P2 = 304 × 7.34

440.88P2 = 2231.36

P2 = 2231.36/440.88

P2 = 5.06

The final pressure is 5.06atm

6 0

3 years ago

The net force on a vehicle that is accelerating at a rate of 1.2 m/s² is 1500 newtons. What is the mass

kotegsom [21]

Answer:

1250kg

Explanation:

Given parameters:

Acceleration = 1.2m/s²

Force = 1500N

Unknown:

Mass on the vehicle = ?

Solution:

According to newton's second law of motion:

Force = mass x acceleration

Since mass is the unknown, insert the parameters and solve;

1500 = mass x 1.2

mass = $\frac{1500}{1.2}$ = 1250kg

5 0

3 years ago

The solubility of a gas is 0.890 g/L at a pressure of 120 kPa. What is the solubility of the gas if the pressure is changed to 1

IgorC [24]

The solubility of the gas if the pressure is changed to 100 kPa is 0.742 g/L

<h3>Effect of Pressure on Solubility </h3>

As the <em>pressure </em>of a gas increases, the <em>solubility </em>increases, and as the <em>pressure </em>of a gas decreases, the <em>solubility </em>decreases.

Thus, Solubility varies directly with Pressure

If S represents Solubility and P represents Pressure,

Then we can write that

S ∝ P

Introducing proportionality constant, k

S = kP

S/P = k

∴ We can write that

$\frac{S_{1} }{P_{1} } = \frac{S_{2} }{P_{2} }$