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Chemistry

2 answers:

jarptica [38.1K]2 years ago

7 0

Answer:

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.

Explanation:

mixer [17]2 years ago

3 0

Answer:

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity.

physical changes are boiling, melting, freezing, and shredding.

Explanation:

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31.5 grams of an unknown substance is heated to 102.4 degrees Celsius and then placed into a calorimeter containing 103.5 grams

Alexxandr [17]

Heat gained in a system can be calculated by multiplying the given mass to the specific heat capacity of the substance and the temperature difference. It is expressed as follows:

Heat = mC(T2-T1)

When two objects are in contact, it should be that the heat lost is equal to what is gained by the other. From this, we can calculate things. We do as follows:

Heat gained = Heat lost
mC(T2-T1) = - mC(T2-T1)
31.5C (102.4 - 32.5) = 103.5(4.18)(32.5 - 24.5)
C = 1.57 J/C-g

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3 years ago

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Explanation:

c2H5

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c2H5

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2 years ago

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2 years ago

C. Neither a Physical or Chemical Changu

Nutka1998 [239]

Explanation:

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3 years ago