What is the enthalpy change of reaction?
2HCl + Na2CO3 ----> 2NaCl +CO2 + H2O
heat released= +315kJ mol-1
HCl 有 2mol
Na2CO3 有1 mol
我知答案係- 315kJ mol-1
點解-315/mol of Na2CO3 而唔係315/mol of HCl
我呀SIR 話咩 2mol HCl 進行左1mol 次reaction，
如果要除要將HCl 個mol除返2，其實我唔明，
請各位CHEM 神解救我
化學enthalpy change問題
2014-04-20 1:38 am
回答 (1)
2014-04-21 1:31 am
✔ 最佳答案
Enthalpy change of reaction is defined as the enthalpy change when ONE mole of reactants as stated in the balanced equation react to form products.In the equation, 2HCl + Na2CO3 ----> 2NaCl +CO2 + H2O,
there is 2 mole of HCl, so the enthalpy change of HCl in the reaction should be divided by 2.
參考: Just a dse student, not any expert. If there're mistakes, please point out before 24/4/14 (T_T) Thx
收錄日期: 2021-04-13 21:18:24
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