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  3. a. calculate the enthalpy change, Δh, for the

A. Calculate the enthalpy change, ΔH, for the process in which 49.3 g of water is converted...

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Chemistry

A.

Calculate the enthalpy change, ΔH, for the process inwhich 49.3 g of water is converted from liquid at 18.5 ∘C to vaporat 25.0 ∘C .

For water, ΔHvap = 44.0 kJ/mol at 25.0 ∘C ands= 4.18 J/(g⋅∘C) for H2O(l)

B.

How many grams of ice at -6.4 ∘C can be completely converted toliquid at 12.3 ∘C if the available heat for this process is5.33×103 kJ ?

For ice, use a specific heat of 2.01 J/(g⋅∘C) and ΔHfus= 6.01 kJ/mol .

Answer & Explanation Solved by verified expert
4.1 Ratings (730 Votes)
A dH for overall reaction dH for water going from liquid to vapor vaporization dH for liquid H2O moving from 185 oC to 25 oC dH mass H2O x specific heat H2O x TfinalTinitial 493    See Answer
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