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Alik [6]
3 years ago
9

In the chemical reaction, how many grams of nitrogen are needed to completely react with 24.3 grams of hydrogen

Chemistry
1 answer:
vlabodo [156]3 years ago
5 0

Answer:

112.540 gram of N2

Explanation:

From the balanced chemical equation

N2+3H2----->2NH3

It means that 1 mole of Nitrogen needs 3 moles of hydrogen

In term of mass,we can say that

6.048 gram of H2 needs 28.01 gram of N2

or, 1 gram of H2 needs (28.01/6.048) gram of N2

and 24.3gram of H2 needs (24.3*28.01/6.048) gram of N2

=112.540 gram of N2

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A bomb calorimeter has a heat capacity of 783 J/oC and contains 254 g of water whose specific heat capacity is 4.184 J/goC. How
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Answer : The amount of heat evolved by a reaction is, 4.81 kJ

Explanation :

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q=[q_1+q_2]

q=[c_1\times \Delta T+m_2\times c_2\times \Delta T]

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q = heat released by the reaction

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c_1 = specific heat of calorimeter = 783J/^oC

c_2 = specific heat of water = 4.184J/g^oC

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q=[(783J/^oC\times -2.28^oC)+(254g\times 4.184J/g^oC\times -2.28^oC)]

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Therefore, the amount of heat evolved by a reaction is, 4.81 kJ

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