Question

05. Usually all solvent volume rises with increae in temperature, but not Universal Solvent Explain why. The surface area of the metal plate is 3.6x 10 mat 25' ¿ when the metal plate is heated te 200°C, its area increases by 1.1 cm'. Find the coefficient of areal expansion of metal,​

Answer 1

Answer:

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Answer 2

Usually all solvent volume rises with increase in temperature, but not Universal Solvent.

Water is considered as universal solvent.

• If we rise the temperature from 0° C - 4° C, the volume of water will decrease and the density will increase.
• If we rise the temperature beyond 4° C, the volume of water will increase in a normal way like other solvents and the density decreases.
• It happens in a parabolic order.
• This happens because of the Hydrogen bonds present in the water molecule.

For the second part of the question,

Surface area(A) = 3.6 × 10 m²

Temperature increase (dT) = 200° C

Area increase (dA) = 1.1 cm²

                              = 1.1/10⁴ m²

              From the formula,

        $\alpha = \frac{1}{A} \frac{dA}{dT}$    α = coefficient of areal expansion of metal

We can easily calculate the value of coefficient of areal expansion of metal.