hi my dear friend,
because we must add heat, boiling water is a process that chemists call endothermic. clearly, if some processes require heat, others must give off heat when they take place. changes of state involve a solid melting, a liquid freezing, a liquid boiling or a gas condensing.
here ecell = 0, and ∆g = 0, and q = k equation are three relationships are true at equilibrium.
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