1 Using Enthalpies Of Formation Calculate The Standard Change In Enthalpy For The Thermite Reaction 2al S Fe O3 S 1 (44.51 KiB) Viewed 39 times
1 Using Enthalpies Of Formation Calculate The Standard Change In Enthalpy For The Thermite Reaction 2al S Fe O3 S 2 (44.51 KiB) Viewed 39 times
1) Using enthalpies of formation, calculate the standard change in enthalpy for the thermite reaction: 2Al(s) + Fe₂O3(s) →→→ Al₂O3(s) + 2Fe(s) AH for Fe₂O3(s) = -826 kJ/mol AH for Al₂O3(s) = -1676 kJ/mol AH for Al(s) = AH for Fe(s) = 0 3) A gas absorbs 45 kJ of heat and does 29 kJ of work. Calculate AE. 4)A system releases 125 kJ of heat while 104 kJ of work is done on it. Calculate AE 5) A balloon is being inflated to its full extent by heating the air inside it. In the final stages of this process, the volume of the balloon changes from 4.00 x 10° L to 4.50 x 10° L by the addition of 1.3 x 10 J of energy as heat. Assuming that the balloon expands against a constant pressure of 1.0 atm, calculate AE for the process. (To convert between L atm and J, use 1 L atm = 101.3 J.) 6) How much heat is given off when an 869 g iron bar cools from 94°C to 5°C? s of Fe = 0.444 J/g. C
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