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Artyom0805 [142]
3 years ago
10

Whats the name of the Changes in matter which require heat

Chemistry
1 answer:
Oksana_A [137]3 years ago
4 0

Answer:

Evaporation involves a liquid becoming a gas and sublimation is the change of a solid directly to a gas. Phase changes require either the addition of heat energy (melting, evaporation, and sublimation) or subtraction of heat energy (condensation and freezing).

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What do sodium and magnesium have in common?
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How does a buffer resist change in ph upon addition of a strong acid?
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Any buffer exists in this equilibrium
 
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How do you know something is there if you can't see it?
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Explanation:

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3 0
3 years ago
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Can someone please help me understand this?
Nataliya [291]

Answer:

French physicist Jacques Charles (1746-1823) studied the effect of temperature on the volume of a gas at constant pressure. Charles's Law states that the volume of a given mass of gas varies directly with the absolute temperature of the gas when pressure is kept constant. The absolute temperature is temperature measured with the Kelvin scale. The Kelvin scale must be used because zero on the Kelvin scale corresponds to a complete stop of molecular motion.

alt

Figure 11.5.1: As a container of confined gas is heated, its molecules increase in kinetic energy and push the movable piston outward, resulting in an increase in volume.

Mathematically, the direct relationship of Charles's Law can be represented by the following equation:

V

T

=k

As with Boyle's Law, k is constant only for a given gas sample. The table below shows temperature and volume data for a set amount of gas at a constant pressure. The third column is the constant for this particular data set and is always equal to the volume divided by the Kelvin temperature.

Explanation:

PLEASS MARK ME AS BRAINLIEST ANSWER

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Objects 1 and 2 collide and stick together. Which best describes the momentum of the resulting single object? It is less than th
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Answer:

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Explanation:

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