A.2.62%
B.2.26%
C.0.62%
D.0.26%
A.25.0mL
B.25.00mL
C.(25.00±0.01)mL
D.(25.00±0.02)mL
A.249.06mL
B.250.0mL
C.250mL
D.250.10mL
A.0.99839g/mL
B.0.99707g/mL
C.0.99754g/mL
D.0.99889g/mL
A.1.75g/ml
B.1.85g/ml
C.1.75Kg/l
D.1.85Kg/l
1摩尔质量的氢气,在压强为1.013x105Pa,温度为20°C体积为V0时. (1)先保持体积不变,加热使其温度升高到80°C,然后令其作等温膨张,体积变为2V0;(2)先使其作等温膨胀至体积为2V0然后保持体积不变,加热使其温度升高到80°C.试分别计算以上两种过程中,气体吸收的热量对外所作的功和内能增量.