31. A student tries to determine the specific latent heat of vaporisation of a liquid by an electrical method. A heater is used to boil the liquid and when the liquid is boiling, the mass of liquid vaporised per second is measured at two different powers for the heater. At the power of 40 W and 80 W, the liquid is vaporised at the rate of 0.0417 kg s' and 0.0893 kg s' respectively. What is the best estimate of the specific latent heat of vaporisation of the liquid? A. 840 J kg B. 896 J kg C. 928 J kg' D. 959 J kg' [A]

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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31. A student tries to determine the specific latent heat of vaporisation of a liquid by an electrical method. A
heater is used to boil the liquid and when the liquid is boiling, the mass of liquid vaporised per second is
measured at two different powers for the heater. At the power of 40 W and 80 W, the liquid is vaporised
at the rate of 0.0417 kg s' and 0.0893 kg s' respectively. What is the best estimate of the specific latent
heat of vaporisation of the liquid?
A. 840 J kg' B. 896 J kg C. 928 J kg' D. 959 J kg
[A]
Transcribed Image Text:31. A student tries to determine the specific latent heat of vaporisation of a liquid by an electrical method. A heater is used to boil the liquid and when the liquid is boiling, the mass of liquid vaporised per second is measured at two different powers for the heater. At the power of 40 W and 80 W, the liquid is vaporised at the rate of 0.0417 kg s' and 0.0893 kg s' respectively. What is the best estimate of the specific latent heat of vaporisation of the liquid? A. 840 J kg' B. 896 J kg C. 928 J kg' D. 959 J kg [A]
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