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eiama Donorn Assignment 21-Thermochemistry CP2120 Summer 2017 Assigned on Sunday.6/25/2017 Due by Thursday,629/2017 w all caleulations and write legibly with correct spelling, panctwation, and use of chemical symbols and terminology for full credit Show all calculations and I. What is the change in the internal energy of a system(AU) and 12 kJ of work is performed on the syatem? 1. What is the change in the internal cneray of a syste(A)oftbed by the system encuincC 71J of hegt eneray is absorbed by the system 2. Write a balanged thermochemical equation for the following process: If 2,mol of sodian tneial reacts with mol of fluorine gas at constant pressure,2 mol 409.2kJ of heat is metal reacts with released. How much energy is relcased if one mole of sodium flaoride is produced? of solid sodium fQluoride is produced and V of 40A.ZKSs 204S A+ 3. A gallon of water was heated from room temperature. 25*C, to almost boiling. 91C How mach enarzy dd the water ahsorb during this process? CAT 4. Given the thermochemical equation: 2Al(s) + 32 01g) → Ah0(s); 4--1,676 kJ determine Δ// for the following reaction: 2A101s) 4AKs) + 30tg) 6. Given the thermochemical reactions, calculate AH of solid iron (II) bromide from the elements. 5. Given the thermochemical reactions, calculate AH for Na(s) + 12 CIdg)--> Naig) + Cl(g); AH = 230.0 kJ Na(s) + V2 Cla(g)-> Naci(s) ; AH =-411 kJ Na(g) + Cl(g) ->NaCI(s) Fe(s) + Brd) FeBn(s)--> FeBr2 (s) + V2 Brd) ; 쓰-18.4 kJ --> FeBr2(s) ; dH=-249.8 kJ
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