Answer to Question #49936 in Inorganic Chemistry for Danny

Question #49936
Question 1: A compound A reacts according to the following hypothetical equation and has a molecular weight of 48.36 g/mol. 3 A (s) +B (aq) ––> 2 C (aq) ∆H° = ? A sample of A, weighing 0.152 g reacts in a flask containing 250.00 g of water and the water temperature increases from 24.85 °C to a temperature of 26.26 °C. Calculate ∆H° for the reaction as written in the equation. Answer: -1408 kJ Question 2: For which of the following reactions is ∆H° = ∆H°f, the heat of formation? i. C (s) + 2 F2(g) ––> CF4 (g) ∆H° = – 221.0 kJ ii. H(g) + Br (g) ––> HBr (g) ∆H° = –366.2 kJ iii. 2 C(s) + H2(g) + 3 Cl2(g) ––> 2 CHCl3 (g) ∆H° = –268.2 Could you also explain exactly what Delta H means.
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2014-12-10T13:13:58-0500
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