[化學] 普化的小小題目

看板TransBioChem作者finalpoet (finalpoet)時間14年前 (2010/05/19 22:46)推噓5(5推 0噓 17→)

留言22則, 4人參與討論串1/1

1) Two solutions, initially at 24.60°C, are mixed in a coffee cup calorimeter (Ccal = 15.5 J/°C). When a 100.0 mL volume of 0.100 M AgNO3 solution is mixed with a 100.0 mL sample of 0.200 M NaCl solution, the temperature in the calorimeter rises to 25.30°C. Determine the ΔH。rxn for the reaction as written below. Assume that the density and heat capacity of the solutions is the same as that of water. ΔH。rxn =? A) -35 kJ B) -69 kJ C) -250 kJ D) -16 kJ E) -140 kJ 2)What pressure would a gas mixture in a 10.0 L tank exert if it were composed of 48.5 g He and 94.6 g CO2 at 398 K? A) 39.6 atm B) 7.02 atm C) 32.6 atm D) 46.6 atm E) 58.7 atm 3) According to the following reaction, what amount of Al2O3 remains when 20.00 g of Al2O3 and 2.00 g of H2O are reacted? A few of the molar masses are as follows: Al2O3 = 101.96 g/mol, H2O = 18.02 g/mol. A) 28.33 g B) 14.00 g C) 8.33 g D) 19.78 g E) 11.67 g Thanks!!! -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 203.71.94.31

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ellenroy

05/19 22:57, , 1^F

05/19 22:57, 1^F

※ 編輯: finalpoet 來自: 203.71.94.31 (05/19 23:18)

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finalpoet

05/19 23:18, , 2^F

05/19 23:18, 2^F

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