Consider the following reaction.2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ Calculate the heat when 104.8 mL of 0.500 M HCl is mixed with 300.0 mL of 0.415 M Ba(OH)2.Assuming that the temperature of both solutions was initially 25.0°C
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Consider the following reaction.
2 HCl(aq) + Ba(OH)2(aq) BaCl2(aq) + 2 H2O(l) ΔH = -118 kJ
Calculate the heat when 104.8 mL of 0.500 M HCl is mixed with 300.0 mL of 0.415 M Ba(OH)2.Assuming that the temperature of both solutions was initially 25.0°C and that the final mixture has a mass of 404.8 g and a specific heat capacity of 4.18 J/°C·g,calculate the final temperature of the mixture.
____________°C
1.总共有104.8*0.5mmol即52.4mmolHCl,0.415*300mmol即124.5mmolBa(OH)2
1分子HCl与一分子 Ba(OH)2反应,Ba(OH)2过量.则有52.4mmolHCl参加反应,提示2molHCl参加反应放热118kj,所以放热3.09kJ
2.质量为404.8g,比热容为4.18J/°C·g,共3.0916kJ
所以升温1.8°C,终温为26.8°C
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