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mr Goodwill [35]
3 years ago
6

A 17.98-g piece of iron absorbs 2056.5 joules of heat energy, and its temperature changes from 25°C to 200°C. Calculate the spec

ific heat capacity of iron.
Chemistry
1 answer:
V125BC [204]3 years ago
7 0

Answer: 0.65\ J/g.^{\circ}C

Explanation:

Given

Mass of iron piece is m=17.98\ g

Heat absorbed Q=2056.5\ J

Temperature changes from 25^{\circ}C\ to\ 200^{\circ}C i.e.

\Delta T=200-25=175^{\circ}C

Heat absorbed is given by Q=mc\Delta T\quad [c=\text{specific heat of material}]

Insert the values

\Rightarrow 2056.5=17.98\times c\times 175\\\\\Rightarrow c=\dfrac{2056.5}{3146.5}\\\\\Rightarrow c=0.65\ J/g.^{\circ}C

Thus, the specific heat of iron is 0.65\ J/g.^{\circ}C

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In Universe L, recently discovered by an intrepid team of chemists who also happen to have studied interdimensional travel, quan
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Third element(Vanadium):Ar 3d3 4s2

Explanation:

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Second element(Titanium); [Ar] 3d2 4s2

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3 years ago
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Oksi-84 [34.3K]

Answer:

2 Fe(iii)2O3 + 3 C ==> 2 Fe  + 3 CO2

Explanation:

First of all, you have to translate the words into an equation.

Fe(iii)2O3 + C ==> Fe  + CO2

The easiest way to tackle this is to start with the Oxygens and balance them. They must balance by going to the greatest common factor which is 6. So you multiply the molecule by whatever it takes to get the Oxygens to 6

2 Fe(iii)2O3 + C   ==>     Fe  + 3 CO2

Now work on the irons. There 2 on the left and just 1 on the right. So you need to multiply the iron by 2.

2 Fe(iii)2O3 + C ==> 2 Fe  + 3 CO2

Finally it is the turn of the carbons. There are 3 on the right, so you must make the carbon on the left = 3

2 Fe(iii)2O3 + 3 C ==> 2 Fe  + 3 CO2

And you are done.

5 0
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What does it mean if a solid is malleable?
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Option C

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Hope this helps!

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Explanation :

Polar molecule : When the arrangement of the molecule is asymmetrical then the molecule is polar.

Non-polar molecule : When the arrangement of the molecule is symmetrical then the molecule is non-polar.

The given molecule is, OF_2

The electronegativities of oxygen and fluorine are different. The molecular geometry of OF_2 is bent. As, Fluorine is more elctronegative than the oxygen. So, the arrows putting towards the more electronegative element i.e, fluorine. These arrows do not balance each other. Due to this, the asymmetrical arrangement of these bonds makes the molecule polar.

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7 0
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