(1) Q=qm=2.9×10 7J/kg×5×10 10kg=1.45×10 18J,
(2) V=
=
=6.06×10 10m 3
(3)已知 E=8.5×10 10kWh=8.5×10 10×1000×3600J=3.06×10 17J,
Q=1.45×10 18J,η=
=
=21.1%;
(1) Q=qm=2.9×10 7J/kg×5×10 10kg=1.45×10 18J,
(2) V=
=
=6.06×10 10m 3
(3)已知 E=8.5×10 10kWh=8.5×10 10×1000×3600J=3.06×10 17J,
Q=1.45×10 18J,η=
=
=21.1%;