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InterviewSolution
| 1. |
How muchamount ofheat required to changewaterat 30°c at steam 100 degree celcius |
| Answer» EXPLANATION:I first take care to look up the specific heat of the WATER in its three phases. Here is the result:“The specific heat capacity or the amount of heat needed to RAISE the temperature of a specific substance in a specific FORM one degree Celsius, for water is 4.187 kJ/, for ICE 2.108 kJ/, and water (steam) 1.996 kJ/.”The questioner asks about two phases: from 30 - 100 degC, and 100 - 150 deg CHence we need 4.187 kJ x 70 plus 1.996 kJ x 50 plus the biggest contribution: latent heat of vaporization of water. I see that “ The heat of vaporization of water is about 2,260 kJ/kg”.The sum of these contributions is 293.09 + 99.8 + 2260 = 2652.89 kJ per kg.kg Kkgkgvapour | |