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scoray [572]
3 years ago
8

As a car moves, the engine converts energy. The system consists of: the car (including engine and fuel), Earth, and surface of t

he road. Which choice best describes how energy is transformed in the system.
1- As fuel burns, chemical reactions occur within the fuel, breaking up molecules, forming new molecules, and absorbing energy from the environment. The energy absorbed allows parts of the engine to move. The energy from the surroundings is all transformed into chemical and mechanical energy.

2- As the fuel burns, chemical reactions occur within the feud, breaking up molecules, forming new molecules. And releasing energy. The energy released allows part of the engine to move. The chemical energy is all transformed into mechanical energy.

3- As the fuel burns, chemical reactions occur within the fuel, breaking up molecules, forming new molecules, and releasing energy. The energy is released as heat, and allows parts of the engine to move. The chemical energy is transformed into thermal energy.

4- As the fuel burns, chemical reactions occur within the fuel, breaking up molecules, forming new molecules, and releasing energy. The energy released allows parts of the engine to move. The chemical energy is all transformed into thermal and mechanical energy.
Chemistry
1 answer:
katen-ka-za [31]3 years ago
7 0

Answer:

I believe your answer will be 3--

As the fuel burns, chemical reactions occur within the fuel, breaking up molecules, forming new molecules, and releasing energy. The energy is released as heat, and allows parts of the engine to move. The chemical energy is transformed into thermal energy.

Explanation:

Hope this helps you!!!

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Dmitriy789 [7]
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Answer:

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Explanation:

The statement that is true of a chemical change among the statements given in the question is "It involves changes in the molecular structure". The correct option among all the options that are given in the question is the first option or option "A". I hope the answer has actually come to your help.

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3 years ago
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4 years ago
How much heat is released when 27.6 g P C l subscript 3 cools from 83.1 °C to 55.6 °C? (The specific heat of P C l subscript 3 i
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Answer: Thus 663 J of heat  is released when 27.6 g PCl_3 cools from 83.1 °C to 55.6 °C

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

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Q = Heat released = ?

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Final temperature  = T_f  = 55.6^0c

Change in temperature ,\Delta T=T_f-T_i=(55.6-83.1)^0C=-27.5^0C

Putting in the values, we get:

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As the value of q is negative, it means the heat has been released and it is 663J

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