作者Honor1984 (希望愿望成真)
看板Physics
标题Re: [题目] 热力学问题
时间Tue Dec 22 16:25:03 2009
※ 引述《legenthume (没有脚毛生不如死)》之铭言:
: [领域] (题目相关领域)
: 大一物理
: [来源] (课本习题、考古题、参考书...)
: 习题
: [题目]
: A 1.80 mol sample of an ideal diatomic gas at a pressure of 1.20 atm and temperature
: of 370 K undergoes a process in which its pressure increases linearly with
: temperature. The final temperature and pressure are 670 K and 1.83 atm.
: 问跌尔塔E跟W跟Q
P = KT + M
代入1.20 atm , 370 K
670 K and 1.83 atm
=> K, M
PV = nRT = (KT + M)V
=> V = V(T)
W = ∫PdV = (KT + M)dV(T)
delta E = (5/2)nR delta T
Q = E + W
: [瓶颈] (写写自己的想法,方便大家为你解答)
: 跌尔塔E是
: 5/2nRT(初)-5/2nRT(末)=5/2*1.8*8.314*370-5/2*1.8*8.314*670=-11223.9
: 吗?
: W的部分
: 这题不是绝热也不定温
: 只能用PV=nRT吧
: 积分(nRT/V)dV
: 里面的T要怎麽换成V的函数
: 好像是跟这句有关系?
: pressure increases linearly with temperature
: 这句话我不懂是什麽意思
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1F:推 legenthume:请问KT+M是什麽 怎麽来的 12/22 20:55
2F:推 legenthume:还有积分的式子里面KT+M还是不知道怎麽积分阿 12/22 21:02
3F:推 h888512:自己设的参数吧 linear relation 12/23 01:14
4F:推 going000:KT+M? 好奇+1 12/23 13:44
5F:推 h888512:y=ax+b the basic equation for linear relation,I guess 12/23 13:46