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? asked in Science & MathematicsChemistry · 2 years ago

Calculate the energy involved when 35 grams of ice at -3 degrees is heated to gaseous water at 102 degrees?

1 Answer

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  • 2 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

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