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Tenho um prof muito chato se eu errar ele desconta nota
Analise as reações abaixo e indique qual delas representa uma mudança de estado com liberação de energia:
a)H2(liquido)–>H2(gasoso)
b)H2O(solido)–>H2O(liquido)
c)O2(gasoso)–>O2(liquido)
d)CO2(solido)–>CO2(gasoso)
e)Pb(solido)–>Pb(liquido)
procurei em varios sites, mas não encontrei nada.
na verdade estou em duvida entre a letra A e C
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