Question

Asked Nov 15, 2019

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A 0.867 kg sample of ethanol is in its liquid state at its boiling temperature of 78 C. If 1.93e5 J of energy are transferred into the sample, what percentage of the sample is vaporized?

ethanol has:

a specific heat of 1000 J/kgK in solid form,

a specific heat of 2010 J/kgK in liquid form,

a freezing temperature of –114 C

a boiling temperature of 78 C,

a latent heat of fusion of 1.05e5 J/kg, and

a latent heat of vaporization of 8.54e5 J/kg

Step 1

Consider an ethanol of mass *m* having latent heat of vaporization *L _{v}* and

Step 2

Write the formula for heat(*Q _{required}*) required to change its state to vapour from liquid of the entire ethanol and plug the required values to find it.

Step 3

Since, the heat given(*Qgiven*) to the substance is less than the heat required(*Qrequired*), therefore, only certain amount of substance change its state fr...

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