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Dobry den,
chcem si ujasnit napr. mam rovnicu
C(s) + 02 (g) vznika CO2 (g)
delta H je - 393,5 kJ/mol
a napr
ratam mnozstvo tepla ktore sa uvolni,
a napr mi vyjde 787 kJ.
preco tam uz nepisem znamienko -?
dakujem krasne
doučma.sk
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