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Calculate the energy involved when 35 grams of ice at -3 degrees is heated to gaseous water at 102 degrees?
1 Answer
- billrussell42Lv 72 years ago
here is a similar Q/A, just change a few numbers.
Question: What is the energy needed to heat 1 kg of ice at –20ºC to steam at 150ºC
Ans:
specific heat of water is 4.186 kJ/kgC
specific heat of ice is 2.06 kJ/kgC
specific heat of steam is 2.1 kJ/kgK
heat of fusion of ice is 334 kJ/kg
heat of vaporization of water is 2256 kJ/kg
5 parts to this problem, add them up to get the total
to warm ice to 0ºC
E₁ = 2.06 kJ/kgC x 1 kg x 20ºC
to melt ice
E₂ = 334 kJ/kg x 1 kg
to warm water from 0ºC to 100ºC
E₃ = 4.186 kJ/kgC x 1 kg x 100ºC
to boil water
E₄ = 2256 kJ/kg x 1 kg
to heat steam from 100ºC to 150ºC
E₅ = 2.1 kJ/kgC x 1 kg x (150–100)ºC
E = E₁ + E₂ + E₃ + E₄ + E₅