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3 years ago

Explain endothermic and exothermic reactions

Chemistry

1 answer:

Naya [18.7K]3 years ago

4 0

$\boxed{\boxed{\sf Endothermic \ reaction }}$

It is the type of reaction in which heat energy is Absorb

It absorbs the heat and make the surrounding cool

Melting ice cubes , Evaporation

Its general form is Reactant + heat ---) Product

$\boxed{\boxed{\sf Exothermic \ reaction}}$

It is the type of reaction in which heat energy is releases

It releases the heat and make the surrounding warm

for ex - Respiration , Digestion

Its general form is Reactant ---) Product + heat

All decomposition reaction are endothermic reaction as decomposition reaction needs energy in the form of heat , light or electricity to break down its reactants.

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natulia [17]

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Explanation: I hope this helps!

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3 years ago

Read 2 more answers

Two substances A and B, initially at different temperatures, are thermally isolated from their surroundings and allowed to come

Elden [556K]

Answer:

Explanation:

For solving this we need a heat balance

$Q_{a} = Q_{b}\\m_{a}*C_{a}*\Delta T_{a} = m_{b}*C_{b}*\Delta T_{b}$

By changing the corresponding relations, we have

$m_{a}*C_{a}*\Delta T_{a} = \frac{1}{2}m_{a}*4C_{a}*\Delta T_{b} \\\\\\$

By cancelling similar factor, we obtain

$\Delta T_{a} = 2 \Delta T_{b}\\\frac{\Delta T_{a}}{\Delta T_{b}} = 2\\$

Which means that the change of temperature in A is twice the change of B

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3 years ago

Which area of the periodic table has the most elements included within it?

hjlf

The area of the periodic table that has the most elements included within it is metals (option A).

<h3>What is periodic table?</h3>

Periodic table of elements is a tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).

The periodic table encompasses chemical elements arranged horizontally and vertically. The periodic table is made up of groups and periods.

However, most of the elements on the periodic table are metals because virtually 93 elements are metals.

Therefore, the area of the periodic table that has the most elements included within it is metals.

Learn more about periodic table at: brainly.com/question/11155928

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2 years ago

The Pauli Exclusion Principle tells us that no two electrons in an atom can have the same four quantum numbers.

Anuta_ua [19.1K]

Answer:

See explanation

Explanation:

We can describe electrons using four sets of quantum numbers;

principal quantum number (n)

orbital quantum number (l)

magnetic quantum number (ml)

spin quantum number (ms)

Since no two electrons in an atom can have the same value for all four quantum numbers according to Pauli exclusion theory, for the orbitals given one possible value for each quantum number is shown below;

For 1s-

n = 1, l= 0, ml = 0, ms= 1/2

For 2s-

n= 2, l =0, ml=0, ms=1/2

For 1s and 2s orbitals, there is only one possible value for ml which is zero.

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3 years ago

Consider a mixture of soil and water and compare it to a colloid, such as milk. Which property best differentiates these two mix

mezya [45]

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3 years ago