sebanyak 500 g es batu, yang bersuhu -15 derajat celcius dipanaskan hingga mendiddih pada suhu 100 derajat celcius, jika diketahui :
kalor jenis es : 2.100 joule/kg C
kalor lebur es :334.000 joule/ kg
kalor jenis air : 4.200 Joule/kg C
kalor uap air : 2.260.000 joule/kg
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Q1= m*c*delta t
= 0.5 * 2100* 15
= 15750 J
Q2 = m*L
= 0.5 * 336 000
= 168 000 J
Q3 = m*c*delta t
= 0.5*4200* 100
= 210 000 J
Qtotal = Q1+Q2+Q3= 393.750 J