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kolezko [41]
3 years ago
15

This is edgenuity btw

Chemistry
1 answer:
OLEGan [10]3 years ago
3 0

Answer:

The specific heat capacity of aluminum is 0.90 j/g.°C.

Explanation:

Given data:

Mass of Al cube = 10 g

Heat absorbed = 677 j

Initial temperature=T1 = 50°C

Final temperature =T2= 125°C

Specific heat of aluminum = ?

Solution:

Specific heat capacity:

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

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 = T2 - T1

ΔT = 125°C - 50°C

ΔT = 75°C

Now we will put the values in formula.

Q = m.c. ΔT

677 j = 10 g × c ×  75°C

c = 750 g.°C

c = 677 j  /750 g.°C

c = 0.90 j/g.°C

The specific heat capacity of aluminum is 0.90 j/g.°C.

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A gas mixture containing oxygen, nitrogen, and carbon dioxide has a total pressure of 32.5 kPa. If Po2 =
HACTEHA [7]

Answer:

A gas mixture containing oxygen, nitrogen, and carbon dioxide has a total pressure of 32.5 kPa.

<u>The pressure for oxygen is 3 kPa</u>

Explanation:

According to Dalton's Law of Partial Pressure total exerted by the mixture of non-reacting gases is equal to sum of the partial pressure of each gas.

P_{total}=P_{1}+P_{2}+P_{3}

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For , a gas mixture containing oxygen, nitrogen, and carbon dioxide has a total pressure:

P_{total}=P_{O_{2}}+P_{N_{2}}+P_{CO_{2}}

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