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3 years ago

_____ energy is required to start a reaction. potential activation nuclear kinetic

Chemistry

2 answers:

Alekssandra [29.7K]3 years ago

6 0

Answer: Activation energy is required to start a reaction.

Explanation: The activation energy is the amount of energy required to start a chemical reaction.

Anna35 [415]3 years ago

6 0

Activation energy is required to start a reaction.

Answer: activation

Explanation:

Activation energy is the minimum energy the molecules required in order to collide with each other. Chemical reactions require a particular energy to start its function. The reaction only occurs when the products are more stable than the reactants.

This energy can be in the form of kinetic or potential energy. When the molecules collide, the molecules' kinetic energy used to stretch, sometimes bend and possibly break bonds, causing chemical reactions. Faster the objects move, more the kinetic energy it possesses.

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In a heat engine, 700 J of heat enters the system, and the piston does 400 J of work. What is the final internal (thermal) energ

Vitek1552 [10]

The first law of thermodynamics characterises the two types of energy transfer, as heat and as thermodynamic. The final internal (thermal) energy of the system is 1,500 J.

<h3>What is internal energy?</h3>

The energy present in a system itself for conducting reactions is called internal energy.

Given,

Heat entering system (Q) = 700 J
Work done by the piston (W) = 400
Initial energy $(\rm U_{1})$ = 1200 J

According to the first law of thermodynamics:

$\rm Q = \Delta U + W$

Substituting values in the above equation:

$\begin{aligned}\rm Q &= \rm U_{2} - U_{1} + W\\\\\rm U_{2} &= \rm Q - W + U_{1}\\\\\rm U_{2} &= 700 - 400 + 1200\\\\&= 1500 \;\rm J\end{aligned}$

Therefore, option D. 1500 J is the final energy.

Learn more about internal energy here:

brainly.com/question/2602565

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2 years ago

Read 2 more answers

The highest parts of a transverse wave are called a. troughs. b. crests. c. nodes. d. wavelengths.

Zepler [3.9K]

The highest is b crest.

5 0

3 years ago

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Which number represents an acidic pH, 4 or 9? _______ Numerical Answers Expected! Answer for Blank 1:

Tasya [4]

Answer:

Explanation:

pH scale of acidic is 4.

8 0

3 years ago

The density of an object is

uysha [10]

Answer:

Density is a measure of mass per unit of volume. Density is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume.

I hope it helps.

Have a great day.

5 0

3 years ago

An element has an atomic number of 29. The number of protons and electrons in a neutral atom of the element are *

nasty-shy [4]

The number of protons and electrons in a neutral atom of the element are;

D. 29 protons and 29 electrons

The atomic number of an element is equal to the number of protons in the nucleus of each atom of that element.

Thus copper has an atomic number of 29, all atoms of copper will have 29 protons.

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3 years ago