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3 years ago

Explain in complete sentences how heat is transferred in fluids.

Chemistry

2 answers:

Serga [27]3 years ago

7 0

Answer:

The transfer of heat in fluids is called convection. Convection only occurs in substances that can flow from place to place which are known as fluids. Fluids are water and gases. Convection starts when molecules in a fluid begin to vibrate. The molecules in liquids and gases are more spread apart than in solids. As the molecules vibrate, they move farther apart from one another. The hotter fluid is lighter in density and rises. The cold fluid moves to fill the space at the bottom left by the rising hot fluid. The heated fluid cools as it rises and sinks back down to the bottom. The fluid heats, rises, cools, and falls in a circular motion. Over time, the entire fluid is heated to an even temperature.

Explanation:

navik [9.2K]3 years ago

6 0

Heat, or thermal energy, is transferred in fluids through a process called convection.

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Explanation:

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How are the following aspects of a reaction affected by the addition of a catalyst? 1) activation energy of the reverse reaction

snow_tiger [21]

These are four questions and four answers.

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1) activation energy of the reverse reaction

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3) Rate of the reverse reaction

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4) Activation energy of the forward reaction

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Explanation:

Activarion energy is the energy required by the reactants to form the intermediate transition state and become products.

Catalysts are substances that change the path of the chemical reactions, lowering the activation energy, and thus speeding up the rate of the reactions, since the products can reach the new lower activation energy faster.

The equilibrium reactions are the chemical process in which two reactions, the forward and the reverese reactions, occur simultaneously and at the same rate. The equlibrium reactions may be represented by:

A ⇄ B

Where A → B is the direct or forward reaction, and A ← B is the reverse reaction (note the inversed arrow, from right to left).

For the direct reaction A represents the reactants and B represents the products. On the other hand, B represents the reactants and A represents the reactants of the reverse reaction and A. This, is A is the reactant of the forward reaction and the product of the reverse reaction, while B is the reactant of the reverse reaction and the product of the forward reaction.

Since, the addition of a catalyst lowers the activation energy of the process, the new activation energy is lower for both the forward and the reverse reaction, meaning that:

1. The activation energy of the reverse reaction is decreased (option b. of the first question)

2. The rate of the forward reaction is increased (option a. of the second question)

3. The rate of the reverse reaction is increased (option a. of the third question).

4. Activation energy of the forward reaction is decreased (option b. of the fourth question).

In summary, the addition of a catalyst decreases the activation energy for both forward and reverse reactions, and increases the rate of both forward and reverse reactions.

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