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bagirrra123 [75]
2 years ago
8

The molar heat capacity of solid aluminium is 24.4\text{ J K}^{-1}\text{ mol}^{-1} \text{ at } 25^{\circ}\text{C}24.4 J K −1 mol

−1 at 25 ∘ C. What is the change in internal energy when 1\text{ mol}1 mol of solid aluminium is heated from a temperature of 20^{\circ}\text{C} \text{ to }30^{\circ}\text{C}20 ∘ C to 30 ∘ C?
Chemistry
1 answer:
adoni [48]2 years ago
6 0

Answer:

\Delta U = 244\,J

Explanation:

The change in internal energy is given by the following expression:

\Delta U = n \cdot \bar c \cdot \Delta T

\Delta U = (1\,mole)\cdot \left(24.4\,\frac{J}{mole\cdot K} \right)\cdot (10\,K)

\Delta U = 244\,J

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Answer : The correct option is, They are different units of concentration.

Explanation :

Molarity : It is defined as the number of moles of solute present in one liter of solution.

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\text{Molarity}=\frac{\text{Moles of solute}}{\text{Volume of solution in liters}}

Mass percent : It is defined as the mass of solute present in the mass of solution.

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2 years ago
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Answer:

B

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e) A Lewis base is specie that can donate a proton to an acid. False

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