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SpyIntel [72]
3 years ago
8

Which kind of substance needs more energy to undergo an increase of 25 degrees Celsius something with a high or low specific hea

t ?
Chemistry
1 answer:
Nikolay [14]3 years ago
3 0
<span> The substance that needs more energy to undergo an increase of 25°C will have a higher specific heat, because energy depends directly on specific heat.

Q = cm∆T
where c = specific heat of the substance,
m = mass
∆T = temperature difference </span>
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A what model might include a drawing or a three-dimensional object.​
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A Physical Model might include a drawing or a three-dimensional object.

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6 0
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A drop of water weighing 0.48 g is vaporized at 100 ?c and condenses on the surface of a 55-g block of aluminum that is initiall
irakobra [83]
<h3><u>Answer;</u></h3>

<em>-49 °C</em>

<h3><u>Explanation and solution;</u></h3>
  • Considering the fact that, the specific heat capacity of aluminum is 0.903 J/g x C, and the heat of vaporization of water at 25 C is 44.0 KJ/mol.  

Moles water = 0.48 g / 18.02 g/mol

                      =0.0266  moles

<em>Heat lost by water</em> = 0.0266 mol x 44.0 kJ/mol

                                 =1.17 kJ => 1170 J  

<em>But heat lost =heat gained</em>

<em>Therefore;</em> Heat gained by aluminium = 1170 J  

        1170 = 55 x 0.903 ( T - 25) = 49.7 T - 1242  

                   1170 + 1242 = 49.7 T  

            T = 48.5 °C ( 49 °C <em>at two significant figures)</em>

<em>Hence</em>, final temperature = 49 °C

4 0
3 years ago
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A.) Electrical force is your answer......
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Answer:

<h2>put the bigger number on top then add </h2>

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41.369

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With greater depth of the atmosphere, more air is pressing down from above. Therefore, air pressure is greatest at sea level and falls with increasing altitude

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On top of Mount Everest, which is the tallest mountain on Earth, air pressure is only about one-third of the pressure at sea level.

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