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This post was last edited by Green Lotus on 2017-7-20 at 23:09. To increase the popularity of this section, a daily question activity has been launched; the purpose of this activity is: “Learn a little bit every day, and make significant progress over ten days.” I hope everyone will participate actively; by learning and making progress, you can also easily bring wealth home :) . Participation: Prize of 5 Wealth ; Correct answer: Reward of 10 wealth points ; Note: For questions from the same day, full feedback will be given if answered on the same day; answering the next day earns 5-8 wealth points. This post is valid for 48 hours. http://bbs.hcbbs.com/static/image/hrline/2.gif Fill in the blanks: At a constant external pressure, the boiling point of a pure substance is a _, while the boiling point of a fractionated oil product is a _. Answer: Constant value. Temperature range. Petrochemical sector – “Creative Ideas for Energy Saving” campaign (the second phase is currently in full swing): http://bbs.hcbbs.com/thread-1666758-1-1.html. “My Technical Upgrades” in the coal chemical industry in 2017: http://bbs.hcbbs.com/thread-1786290-1-1.html
At a constant external pressure, the boiling point of a pure substance is a fixed value, whereas the boiling point of a fractional oil product is a range of temperatures.
At a constant external pressure, the boiling point of a pure substance is a fixed value, whereas the boiling point of a fractional oil product is a range of temperatures.
At a constant external pressure, the boiling point of a pure substance is a fixed value, whereas the boiling point of a fractional oil product is a range of temperatures.