["암모니아의 액화 문제", "암모니아는
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氨气在20度时，压力0.87Mpa下液化。请问氨气在20度以上，压力在0.87Mpa下是液体还是气体？氨气在20度以下，压力在0.87Mpa下是液体还是气体?谢谢
你的那个点是之前的三相点吗？如果是的话，楼上说的没错
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