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ID: 1470374 • Letter: H
Question
home / study / questions and answers / science / physics / find the amount of energy needed to be removed ... Question Find the amount of energy needed to be removed from 1 kg of gaseous nitrogen at 22.0C to solid nitrogen at-220.0C. The specific heats are as follows: cgas=1040J/kg·K; cliquid =2040J/kg·K: csolid=1040J/kg·K.Latent Heat for fusion is 2.55 x 10^4. Latent Heat of Vaporization is 2.01 x 10^5 Melting Point: -209.97 C Boiling Point: -195.81 C This is all the information that I am giving.
Explanation / Answer
energy to be removed
E = m*( (Cgas*dt1) + Lv + (Cliquid*dt2) + Lf + (Csolid*dt3) )
E = 1*( (1040*((-195.81)-22)) + (2.01*10^5) + (2040*(-209.97+195.81)) + (2.55*104) + (1040*(-220-(-209.97))) )
E = -64574.8 J
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