作者triumphant10 (yu12510 )
看板Chemistry
标题[问题] alpha factor
时间Thu Nov 29 22:51:32 2018
Q:
If you seal 12mg CaCO3 with a delta O-18(氧18) value of 15.74 permil
and 100mg H2O with a delta O-18 value of -10.20 permil in a gold capsule
at 350度.
The alpha(CaCO3-H2O) is 1.0049 at 350度.
What will be the delta O-18 values of calcite and water after a while?
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A:
我目前只知道
12mg CaCO3之O的mole数 = [12*10^(-3)/100]*3 = 0.00036 mole
100mg H2O之O的mole数 = 100*10^(-3)/18 = 0.00555 mole
[CaCO3的(O-18/O-16)]
Alpha(CaCO3-H2O) = R(CaCO3)/R(H2O) = ---------------------
[H2O的(O-18/0-16)]
请问再来要怎麽解?
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