CH3CH2CH2CH2CH2CH2C CH2CHCH3CH3CH2CH3CH3BCH 1049Assignment Four – Due: 24 April 20071.Calculate the standard enthalpy of formation for gaseous B2H6(diborane) using the following data: 4 B(s) + 3 O2(g) → 2 B2O3(s)∆H°= –2509.1 kJ2 H2(g) + O2(g) → 2 H2O(l)∆H°= –571.7 kJB2H6(g) + 3 O2(g) → B2O3(s) + 3 H2O(l)∆H°= –2147.5 kJ2.A mixture of 1.374 g of H2and 70.31 g of Br2is heated in a 2.00-L flask at 700 K. These substances react as follows: H2(g) + Br2(g) 2 HBr(g)At equilibrium, the flask is found to contain 0.566 g of H2.(a)Calculate the equilibrium concentrations of H2, Br2and HBr. (b) Calculate Kc.3. (a)Using the data provided, calculate ∆G°for the following reaction at 298 K and determine if the reaction is spontaneous.
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