8/17/2019 Makalah Termo Nomer 1
1/2
Soal
1. You are planning a birthday party for your niece and need to
make at least
4 gallons of Kool-Aid, which you like to cool down to 3o! "#o$%
before the
party begins. &nfortunately, your refrigerator is already so
full of threats
that you know there will be no room for the Kool-Aid. 'o, with a
sudden
(ash of insight, you decide to start with 4 gallons of the
coldest tap water
you can get, which you determine is )#o! "1#o$%, and then cool
it down
with a 1-*uart chunk of ice you already ha+e in your freeer. he
owners
manual for your refrigerator states that when the freeer setting
is on
high, the temperature is -#o$. /ill your plan work0 'tates all
of your
assumptions
Jawaban
Diketahui :
Qmasuk =Q keluar
mairdingin.Cpair.∆T =mes.Cpes.∆T +mes.Les
2imana,
$p air 4,J
gram℃ 1###Calori
kg℃
$p es ,1J
gram℃ )##Calori
kg℃
Kalor ebur 5##Calori
gram℃
6assa air 4 galon 1) liter 1) kg
6assa es 1 kuart 7 liter 7 kg
ρ=1000 kg
m3=1
kg
liter
