Lead melt

Find the heat needed to melt an object made of lead weighing 250g and an initial temperature of 35°C. Lead melts at 327°C at normal pressure. Mass heat capacity of lead c = 129 J/kg • K and mass latent heat of lead lt (t is the subscript) = 22.6 kJ/kg.

Correct answer:

Q =  15.067 kJ

Step-by-step explanation:

m=250 g kg=250:1000  kg=0.25 kg t1=35 °C t2=327 °C c=129 J/kg/K l=22.6 kJ/kg  T=t2t1=32735=292 K  Q1=m c T=0.25 129 292=9417 J Q2=l m=22.6 0.25=20113=5.65 kJ  Q=Q1/1000+Q2=9417/1000+5.65=15.067 kJ



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Do you want to convert mass units?

You need to know the following knowledge to solve this word math problem:

    Units of physical quantities:

    Themes, topics:

    Grade of the word problem:


     
    We encourage you to watch this tutorial video on this math problem: video1

    Related math problems and questions: