硫酸钙分解温度

一：问一首歌！！

Can you see me now

歌手：T.A.T.U

Can you see me now? Can you see me now? Can you see?

All this weeping in the air, who can tell when it will fall through floating forests in the air

Across the rolling open sea.

blow a kiss and run through air. Leave the past find nowhere,

Floating forests in the air clowns all around you.

Clowns that only let you know where u let your senses go.

Clowns all around you its a cross i need to bear.

All this black and cruel is fair, this is an emergency

Don′t you hide your eyes from me, open them and see me now.

Can you see me now? Can you see? Can you see me now?

Can you see? Can you see? Can you see?

Floating, floating, floating, floating.

See me here in the air not holding on to anywhere

But holding on so beware I have secrets I wont share.

See me here wishing you if I don′t deny I do contemplate our wish away.

If I ask you not to stay, clowns are here to let u know where u let your senses go,

Clowns all around you it′s a cross I need to bare.

All this black and cruel is fair,

This is an emergency don′t you hide your eyes from me

Open them and see me now.

Can you see me now? Can you see me now? Can you 川ee? Can you see? Can you see?

二：硫酸钙的物理性质

硫酸钙（二水合物）溶解度：　　0℃ 0.233　　10℃ 0.244　　18℃ 0.255　　30℃ 0.264　　40℃ 0.265　　65℃ 0.244　　75℃ 0.234硫酸钙(CaSO4)无色正交或单斜晶体，单斜晶体熔点1450℃，1193℃正交转单斜晶体。密度2.61克/立方厘米，微溶于水。1200℃以上可以分解：2CaSO4 ==1200℃== 2CaO+2SO2↑+O2↑一般由天然产出。也是磷酸盐工业和某些其他工业的副产品。

三：硫酸钙热分解温度为什么高于硫酸镉？

不详