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Nataly_w [17]
4 years ago
9

Why does it generally take more enthalpy to ignite a solid than a gas or liquid?

Chemistry
1 answer:
Anuta_ua [19.1K]4 years ago
6 0

Answer:

It is due to the nature of the reactants

Explanation:

To ignite a solid, we require more heat component compared to liquids and gases. For ignition to occur, oxygen gas combines with a reactant in most cases.

Some factors affect the rate rate at which a chemical proceeds. One of the factors is the nature of reactants.

The solid phase is very slow while the gaseous phase is rapid and fast.

            solid phase < liquid phase <  gas phase

Gases are free and the molecules move in all direction. They easily combine and react very fast.

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The force applied to a machine by a users is called the
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Answer:

When you use a machine, you apply force to the machine. This force is called the input force. The machine, in turn, applies force to an object. This force is called the output force.

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3 years ago
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Which of the following statements about chemical and physical properties is false?
Ber [7]

Answer:

The odor of a substance is a physical property. That would be your answer.

Explanation:

Physical Properties

Physical properties are properties that can be measured or observed without changing the chemical nature of the substance. Some examples of physical properties are:

color (intensive)

density (intensive)

volume (extensive)

mass (extensive)

boiling point (intensive): the temperature at which a substance boils

melting point (intensive): the temperature at which a substance melts

Chemical Properties

Remember, the definition of a chemical property is that measuring that property must lead to a change in the substance’s chemical structure. Here are several examples of chemical properties:

Heat of combustion is the energy released when a compound undergoes complete combustion (burning) with oxygen. The symbol for the heat of combustion is ΔHc.

Chemical stability refers to whether a compound will react with water or air (chemically stable substances will not react). Hydrolysis and oxidation are two such reactions and are both chemical changes.

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4 0
3 years ago
Write down the formula for B<br> example:<br> Hydrogen + Fluorine = Hydrogen Fluorine <br><br> help
Tom [10]

Answer:

P³⁻ + Cl⁻ --> PCl₃

Explanation:

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Mencionar 5 objetos o sustancias químicas que tengan Carbono.
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Answer:    

agua

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6 0
3 years ago
Oil (specific gravity of 0.80 and a viscosity of 0.000042 lbf/ft2) at a temperature of 80 F flows through two separate pipes 10
Elenna [48]

Answer:

The velocity of flow in 10in pipe is 4.16 ft/s.

Explanation:

Given that

Specific gravity = 0.8

Viscosity =0.00042lbf/ft^2

For pipe 1

V_1=6 ft/s,d_1=12\ in

For pipe 1

V_2,d_1=10\ in

If we assume that flow in the both pipe is laminar

For laminar flow through circular pipe

\dfrac{\Delta P}{L}=\dfrac{32V\mu }{d^2}

So same pressure drop we can say that

\dfrac{V_1 }{d^2_1}=\dfrac{V_2}{d^2_2}

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V_2=4.16 ft/s

So the velocity of flow in 10in pipe is 4.16 ft/s.

6 0
4 years ago
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