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zubka84 [21]
3 years ago
6

why is it is difficult to compress a liquid? a. liquid takes the shape of its container. b. the liquid particles flow away when

compressed. c. liquid becomes solid when compressed. d. the liquid particles are very close together.
Chemistry
1 answer:
Dovator [93]3 years ago
3 0
It is either b. or d.
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An iron bar of mass 841 g cools from 84°C to 7°C. Calculate the heat released (in kilojoules) by the metal.
Oduvanchick [21]

Answer:

28.75211 kj

Explanation:

Given data:

Mass of iron bar = 841 g

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Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

specific heat capacity of iron is 0.444 j/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 7°C - 84°C

ΔT = -77°C

By putting values,

Q = 841 g × 0.444 j/g.°C × -77°C

Q = 28752.11 j

In Kj:

28752.11 j × 1 kJ / 1000 J

28.75211 kj

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When one type of energy is transformed into another type of energy during a conversion, _______ is lost to the environment.
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