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Thursday’s Bell Ringer

Thursday’s Bell Ringer. A considerable amount of heat is required for the decomposition of aluminum oxide. 2Al 2 O 3(s)  4Al (s) + 3O 2(g) D H = +3352 KJ What is the heat of formation for 1 mole of aluminum oxide from its elements? A) +3352 KJ B) -3352 KJ C) +1676 KJ D) -1676 KJ.

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Thursday’s Bell Ringer

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  1. Thursday’s Bell Ringer A considerable amount of heat is required for the decomposition of aluminum oxide. 2Al2O3(s) 4Al(s) + 3O2(g)DH = +3352 KJWhat is the heat of formation for 1 mole of aluminum oxide from its elements?A) +3352 KJB) -3352 KJC) +1676 KJD) -1676 KJ

  2. Thursday’s Bell Ringer A considerable amount of heat is required for the decomposition of aluminum oxide. 2Al2O3(s) 4Al(s) + 3O2(g)DH = +3352 KJWhat is the heat of formation for 1 mole of aluminum oxide from its elements?A) +3352 KJB) -3352 KJC) +1676 KJD) -1676 KJ

  3. Entropy Entropy is a measure of disorder. LIQUID GAS SOLID Entropy Increases

  4. Predicting Changes in Entropy For each process or reaction, predict whether entropy would increase (I) or decrease (D). H2O(s)  H2O(l) 2NH3(g)  3H2(g) + N2(g) CaCl2(aq) + Na2CO3(aq)  CaCO3(s) + 2 NaCl(aq) 2 Na(s) + 2 H2O(l)  2 NaOH(aq) + H2(g) I I D I

  5. Friday’s Bell Ringer 3.20 kcal of heat is added to 1.00 kg of ice at 0°C. The heat of fusion of ice is 80 cal/g. How much ice melts?A) 1.00 kgB) 40.0gC) 25.0 gD) 0.960 kg

  6. Friday’s Bell Ringer 3.20 kcal of heat is added to 1.00 kg of ice at 0°C. The heat of fusion of ice is 80 cal/g. How much ice melts?A) 1.00 kgB) 40.0gC) 25.0 gD) 0.960 kg

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