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热力学中,某种物质的化学势指的是,在化学反应或者相变中,此物质的粒子数发生改变时所吸收或放出的能量。在混合物中的某种物质的化学势定义为此热力学系统的吉布斯自由能对此物质粒子数的变化率,即偏导数(其他物质的粒子数及其他系统参数保持不变)。当温度和压强固定时,化学势也被称作偏摩尔吉布斯自由能,或者摩尔化学势[1]。在化学平衡或相平衡状态下,自由能处于极小值,各种物质的化学势与化学计量系数乘积之和为零[2][3][4]

𠯤"},{"l":"zh-hk","t":"吩嗪"}]}">𠯤"},{"l":"zh-hk","t":"吩噻嗪"}]}">𠯤"},{"l":"zh-hk","t":"酞嗪"}]}">𠯤"},{"l":"zh-hk","t":"哌嗪"}]}">𠯤"},{"l":"zh-hk","t":"吡嗪"}]}">𠯤"},{"l":"zh-hk","t":"噠嗪"}]}">𠯤"},{"l":"zh-hk","t":"噻嗪"}]}">𬭩内盐"},{"l":"zh-tw","t":"偶極體"}]}">𬭩内盐"},{"f":"偶极体","l":"zh-sg","t":"𬭩内盐"},{"f":"偶极体","l":"zh-my","t":"𬭩内盐"}]}">𬭩内盐"},{"f":"鎓内盐","l":"zh-sg","t":"𬭩内盐"},{"f":"鎓内盐","l":"zh-my","t":"𬭩内盐"},{"f":"鎓内盐","l":"zh-tw","t":"偶極體"},{"f":"鎓内盐","l":"zh-hk","t":"偶極體"},{"f":"鎓内盐","l":"zh-mo","t":"偶極體"}]}">𬭩内盐"},{"f":"鎓內鹽","l":"zh-sg","t":"𬭩内盐"},{"f":"鎓內鹽","l":"zh-my","t":"𬭩内盐"},{"f":"鎓內鹽","l":"zh-tw","t":"偶極體"},{"f":"鎓內鹽","l":"zh-hk","t":"偶極體"},{"f":"鎓內鹽","l":"zh-mo","t":"偶極體"}]}">鿔"},{"l":"zh-hant","t":"鎶"}]}">𫟼"},{"l":"zh-hant","t":"鐽"}]}">𫓧"},{"l":"zh-hant","t":"鈇"}]}">𫟷"},{"l":"zh-hant","t":"鉝"}]}">鿭"},{"l":"zh-hant","t":"鉨"}]}">𬬭"},{"l":"zh-hant","t":"錀"}]}">𬬻"},{"l":"zh-hant","t":"鑪"}]}">

半导体物理中,零温电子系统的化学势被称为费米能[5]