问题 选择题

在固定容积的密闭容器中合成氨的反应达到了平衡,容器中含有0.1 mol N2、0.3 mol H2、0.1 mol NH3,若维持原来的条件,向该容器中再加入0.1 mol N2、0.3 mol H2、0.1 mol NH3,则(    )

A.正、逆反应速率同时增大,平衡不移动

B.正、逆反应速率同时增大,NH3的百分含量升高

C.正、逆反应速率同时增大,平衡向逆反应方向移动

D.正、逆反应速率不变,平衡不移动

答案

   B

   因为再加入0.1 mol N2、0.3 mol H2、0.1 mol NH3后,其浓度变化关系相当于在原来的基础上将容器体积缩小到原来的一半,所以此时正、逆反应速率都会加快,平衡向正反应方向移动。

问答题

As they do every week, the 90 members of the Sigma Phi Epsilon fraternity at Oregon State University file into their dining hall for a very different kind of frat party. The rows of scrubbed and pressed young men sit down to eat under the watchful eye of the brother who is acting as manners chair. No swearing is permitted. Napkins on laps are required. Small bites are urged instead of gulps. Scofflaws must do penalty push-ups or pay a fine into the piggy bank in the middle of each table.
Call it the new fratiquette, but these weekly civility sessions are just a small part of a growing reform movement led by SigEp, the country’s largest fraternity. As colleges continue to crack down on binge drinking, hazing and general hooliganism, some fraternities are redefining the Greek experience in order to save it.
Oregon State’s is among the 256 SigEP chapters nationwide that have adopted the Balanced Man Program, an intensive four-year fraternity experience created 13 years ago by concerned SigEp leaders to shift the center of life in the houses from beer-soaked blowouts to activities that promote healthy living and self-respect. To eliminate hazing, the program does away with the pledge system—all recruits are equal members from Day One. Alcohol is allowed, but booze-free activities are encouraged.
The SigEps of Oregon State were a long way from such genteel pursuits just five years ago. At a school that offers a degree in fermentation sciences, the SigEps of old stood out for their love of inebriation. "When I got here in 2001, it was awful," says Mike Powers, 20, a senior. "Drugs were coming in, grades were falling. There were nothing but monster parties." The chapter hit bottom that fall when a single party resulted in a whopping $195,000 in fines for 26 separate counts of providing alcohol to minors. The house needed a fresh start, which led to a purge of partyers in which a third of the brothers left the chapter. "We needed to get rid of the cancers of the fiat," says Powers.
Today the chapter, reorganized under the Balanced Man Program, has rebounded. Membership is almost back to prepurge levels, and last summer the chapter won a national SigEp award that placed it in the top 15% in academics and community service of all chapters in the country.
But the frat makeovers have their detractors. In the rush to save fraternity life, some say, SigEp and the Balanced Man Program may be ruining it. "Some of my best experiences in college were stupid things I did with my friends, usually involving alcohol," says Kevin Stange, whose SigEp chapter at the Massachusetts Institute of Technology was frequently in trouble with the national organization when he was a student in the late 1990s and which eventually closed for several years. "We never went too far, though," says Stange. "And the real reason people join frats is to have fun. Balanced Man doesn’t address that." Online chat rooms like greekchat, com are ablaze with debate about the changes. As one SigEp who clearly missed the etiquette lessons wrote, "The [Balanced Man Program] has effectively cut the balls [off] our fraternity. "
The number of new SigEp recruits has increased 11% since 1999. Insurance premiums, which have a habit of rising when fiat boys burn down their houses or fail off their balconies, have gone down the past two years. The average GPA for SigEp’s members has reached the 3.0 mark, which is the highest of all fraternities.
Following SigEp’s lead, other national fraternities have rolled out similar programs, from Sigma Alpha Epsilon’s True Gentleman to Beta Theta Pi’s Men of Principle. According to some members, there’s an unexpected bonus from all these reforms: women seem to like them. "They can go to 21 other fraternities to get drunk," says Oregon State SigEp member Cameron Saffer. "Here you find respectful young men. \

Why does the author mention the change of "insurance premiums" at the end of the passage What does it tell us

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