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1.How much heat (in kJ) is required to warm 13.0 g of ice, initially at -10.0...

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Chemistry

1.How much heat (in kJ) is required to warm 13.0 g of ice,initially at -10.0 ∘C, to steam at 109.0 ∘C? The heat capacity ofice is 2.09 J/g⋅∘C and that of steam is 2.01 J/g⋅∘C.

2. How much energy is released when 42.5 g of water freezes?

3. Suppose that 0.86 g of water condenses on a 75.0 g block ofiron that is initially at 24 ∘C.

If the heat released during condensation goes only to warmingthe iron block, what is the final temperature (in ∘C) of the ironblock? (Assume a constant enthalpy of vaporization for water of44.0 kJ/mol.)

Express your answer using two significant figures.

Answer & Explanation Solved by verified expert
3.7 Ratings (636 Votes)
1 Q mol x H Q m x DT x Cp First heat needed to reach 0C Q 13g x 10C x 209JgC 2717 J Then heat needed to change to liquid state Q    See Answer
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