Answered

IDNLearn.com is your go-to resource for finding precise and accurate answers. Ask your questions and receive accurate, in-depth answers from our knowledgeable community members.

How much energy, in kilojoules, is required to melt 20 kg of ice at 0°C?

Sagot :

The energy required to melt 20 kg of ice at 0°C is 6.68 kJ.

The enthalpy change for melting of an ice is called the enthalpy of fusion. Its value is 6.02 kJ/mol. This means for every mole of ice we must apply  6.02 kJ of heat for melting. The calculation of heat is done by following equation.

q = n×ΔH

  • q is heat
  • n is number of moles
  • ΔH is change in enthapy

in this problem we need to calculate heat needed to melt 20grams of ice at  0°C .

Calculation of moles of water,

Number of moles of water (n) = given mass/ molar mass = 20g/18.02g/mol

Number of moles of water (n) = 1.109 mole

heat or energy required = q = n×ΔH =  1.109 mole× 6.02 kJ/mol = 6.68 kJ

learn about energy,

https://brainly.com/question/626780

#SPJ4

We appreciate your participation in this forum. Keep exploring, asking questions, and sharing your insights with the community. Together, we can find the best solutions. Thank you for visiting IDNLearn.com. We’re here to provide dependable answers, so visit us again soon.