Calculate the amount of heat energy required to convert 45.0 g of ice at -15.5°C to...

Calculate the amount of heat energy required to convert 45.0 g of ice at -15.5°C to steam at 124.0°C. (Cwater = 4.18 J/g°C; Cice = 2.03 J/g°C; Csteam = 2.02 J/g°C; molar heat of fusion of ice = 6.01 ✕ 103 J/mol; molar heat of vaporization of liquid water = 4.07 ✕ 104 J/mol). Calculate the amount of heat energy required to convert 24.0 g of water at 25.5°C to steam at 124.0°C. (Cwater = 4.18 J/g°C; Csteam = 2.02 J/g°C; molar heat of vaporization of liquid water = 4.07 ✕ 104 J/mol).

Expert Solution

Ans. Note: Convert molar enthalpies to J/g as explained below-

Given: Heat of vaporization = 4.07 x 10⁴ J / mol ; use 1 mol = 18.0 g

= (4.07 x 10⁴ J) / (18.0 g)

= 2261.11 J / g

queen_honey_blossom answered 2 years ago

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