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Dmitry_Shevchenko [17]
3 years ago
12

Examples of Compounds, Mixtures and Elements.

Chemistry
1 answer:
AleksandrR [38]3 years ago
7 0

Answer:

COMPOUNDS-water, hydrogen peroxide, salt,baking soda

MIXTURE- Dirt and water, water and salt, smoke and fog

ELEMENTS- carbon, oxygen, gold, silver, iron

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Calculate the heat absorbed by a sample of water that has a mass of 45.00 g when the temperature increases from 21.0oC to 38.5 o
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Answer:

The heat absorbed by the sample of water is 3,294.9 J

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

The sensible heat of a body is the amount of heat received or transferred by a body when it undergoes a temperature variation (Δt) without there being a change of physical state (solid, liquid or gaseous). Its mathematical expression is:

Q = c * m * ΔT

Where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case:

  • Q=?
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  • c= 4.184 \frac{J}{g*C}
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Replacing:

Q= 4.184 \frac{J}{g*C} * 45 g* 17.5 C

Solving:

Q=3,294.9 J

<u><em>The heat absorbed by the sample of water is 3,294.9 J</em></u>

<u><em></em></u>

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