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硫(liu)酸(suan)(suan)（化(hua)学(xue)式(shi)：H2SO4），硫(liu)的*重要的含氧酸(suan)(suan)。无水硫(liu)酸(suan)(suan)为无色油状液体，10.36℃时(shi)结(jie)晶，通常使用的是(shi)它(ta)的各(ge)种不同浓度(du)的水溶液，用塔式(shi)法和接触法制取(qu)。前(qian)者所得为粗制稀(xi)硫(liu)酸(suan)(suan)，质(zhi)量分(fen)数一般(ban)在75%左(zuo)右；后者可得质(zhi)量分(fen)数98.3%的浓硫(liu)酸(suan)(suan)，沸点338℃，相对密度(du)1.84。

中文(wen)名     硫酸(suan)                                                                           外文(wen)名 Sulfuric acid

分子式   H₂SO₄                                                                     分子量  98.078

标况状态    透明无色无臭液体                                                密    度    1.8305 g/cm³

熔    点(dian)     10.371 ℃                                                                  沸    点(dian)  337 ℃

溶(rong)解度    与水任意(yi)比互溶(rong)              ;                                          蒸汽压     6×10⁻⁵ mmHg

动态粘滞(zhi)度     0.021 Pa s (25℃)                                               表面张力    0.0735 N/m

折射率     1.41827                                                                      热容量      1.416 J/(g K) (STP)

汽(qi)化(hua)热           0.57 kJ/g (STP)                                                     熔化(hua)热     0.1092 kJ/g (STP)

CAS登记号    ;  7664-93-9