How G and a simplify the expressions Consider what happens to them when the state of a system changes at constant temperature da=dU -Tds(const. t) dG=dH-Tas(const T) Now introduce Tas>du (const. V) Tds>dH(const. P) daso (const. T,V, no non-pV work) dG<o (const T, P, no non-pV work) 4上一内容下一内容令回主目录 返回 2021/2/21上一内容 下一内容 回主目录 返回 2021/2/21 How G and A simplify the expressions Consider what happens to them when the state of a system changes at constant temperature: dA = dU –TdS (const.T) dG = dH – TdS (const.T) Now introduce TdS≥dU (const. V) TdS≥dH (const. P) dA≤0 (const. T,V,no non-pV work) dG≤0 (const. T,P,no non-pV work)