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үвш уу | Initial mass of ومصصط уре : 13о слы . 130 ml Temperature of offee - 850 coffee density of Water x volume of = Iglme X 130 me a Water x volume of coffee I (coffee is treated as water) Specific heat of coffee is also same as water mass Suitial of Ice - 159 Temperature of Heat of fusion Ice = o'c of ice at 0°C - 6 kJ/mol. no of moles of u 18.01g/mol 0.8 32 mol Heat required to meet ice & Heat required to warm - the watet Heat of fusion of ice x + m x c X AT no of mol of Ice 6 kJ/mol x 0.832 mol + 159 x 4.184 3/g:0 x (T1 - O'C) = 4.992 KJ + 62.76 I/C (T-00) = 4992 I & 62.76 I/C (If oc) = Heat requica to cure the coffee - - m xc XOT = - 130 g x 4.184 7/9.0C x (T-850) 543.92 3/0 (Tj - 850) q
assunung no heat loss, 4992 I + 62.76 / (( T, - 0°C) = -543.927/C (7-8) 4992 I + 62 76 5/°C XT – 0 = - 543-92 I/C x Tj + 46233 2 J 62.76 1/0 X Tp + 54.92 3/0 XT l = 46233.2 I- 1. X To 543.927 4992] 606.68 I/'c XT = 41241.2 I 41241.2 T T = 41241.27 606.68 3.0 = 67.97 °C
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