Answered: To make use of ionic hydrates for…

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter5: Principles Of Chemical Reactivity: Energy And Chemical Reactions

Section: Chapter Questions

Problem 60PS: The Romans used calcium oxide, CaO, to produce a strong mortar to build stone structures. Calcium...

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To make use of ionic hydrates for storing solar energy (seeChemical Connections, p. 259), you place 500.0 kg of sodiumsulfate decahydrate on your house roof. Assuming complete re-action and 100% efficiency of heat transfer, how much heat(in kJ) is released to your house at night?

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$N a_{2} S O_{4} s o l u t i o n c r y s t a l l i z e s f o r m i n g s o d i u m s u l p h a t e d e c a h y d r a t e r e l e a \sin g t h e e n e r g y i n f o r m o f h e a t N a_{2} S O_{4} (a q) \underset{< 32^{°} C}{\to} N a_{2} S O_{4} . 10 H_{2} O (s) ∆ H = - 354 K J m o l a r m a s s o f N a_{2} S O_{4} . 10 H_{2} O (s) i s 322.19 g / m o l T h u s, 322.19 g o f N a_{2} S O_{4} . 10 H_{2} O (s) r e l e a s e s 354 K J o f e n e r g y$

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