January 2019 1 20 Report
Diketahui delta H pembentukan standar CaH2 = -189kj/mol , H2O = -285kj/mol , Ca(OH)2 = -197 kj/mol. perubahan entalpi dari reaksi CaH2 + 2H2O -> Ca(OH)2 + 2H2 adalah..
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