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timama [110]
4 years ago
15

Two facts about calorimetry

Chemistry
1 answer:
blagie [28]4 years ago
8 0
The measure of the quantity of heat exchanged. 
Uses many different units of measurements. 
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a propane torch is lit inside a hot air balloon during preflight preparations to inflate the balloon. which condition of the gas
earnstyle [38]

Answer:

The pressure remains constant

Explanation:

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3 years ago
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Who developed the first scientific atomic theory?
Annette [7]

Answer:

John Dalton

Explanation:

John Dalton (1766-1844) is the scientist credited for proposing the atomic theory. This theory explains several concepts that are relevant in the observable world.

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2 years ago
Predict the sign of ΔSsys for each of the following processes. Which are positive? (a) Gasoline vapors mix with air in a car eng
OLEGan [10]

Answer:

Positive: a and b

Negative: c

Explanation:

The entropy (S) is the measure of the randomness of the system, and it intends to increase. The randomness can be determined by the energy of the molecules, their velocity and how distance they are between the other molecules.

When the entropy increases, ΔS is positive, when the entropy decreases, ΔS is negative. So, when gasoline mix with air in a car engine, the process intends to continue, the randomness increases and ΔS is positive. When hot air expands, the distance between the molecules increases, so ΔS is positive.

But, when humidity condenses, the molecules stay closer, so there's a decrease in the randomness, then ΔS is negative.

6 0
4 years ago
If we compare and contrast electromagnetic waves with sound waves, all BUT one statement is true. That is
andriy [413]

Answer:

b

Explanation:

3 0
3 years ago
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This is a sign of a chemical reaction that involves the production of bubbles or fizzing
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gas production

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