物理 - 考試
By Belly
at 2013-05-07T20:02
at 2013-05-07T20:02
Table of Contents
http://www.public.com.tw/2002/exam2/course/00210002000300030001.pdf
第3、13、14題
第3題:不知該怎麼解
第十三題:
PV=nRT 加熱後壓力變為2倍 體積不變 >> 2PV=nR(2T)
t=25。C >> T=273+25=298K 加熱後變為2T=2*298=596。C
可是答案是323。C 猜測是273+2*25而來,請問我的觀念哪裡有誤?
且PV=nRT的T是deltaT嗎?還是當下的環境溫度
第十四題:
200*S*(100-40)=120*1*(40-30) S=0.1 cal/g*。C
答案一樣是0.1 但題目給的單位是cal/g*K ,這兩個單位相同嗎?或者樣怎麼互換呢?
謝謝
--
第3、13、14題
第3題:不知該怎麼解
第十三題:
PV=nRT 加熱後壓力變為2倍 體積不變 >> 2PV=nR(2T)
t=25。C >> T=273+25=298K 加熱後變為2T=2*298=596。C
可是答案是323。C 猜測是273+2*25而來,請問我的觀念哪裡有誤?
且PV=nRT的T是deltaT嗎?還是當下的環境溫度
第十四題:
200*S*(100-40)=120*1*(40-30) S=0.1 cal/g*。C
答案一樣是0.1 但題目給的單位是cal/g*K ,這兩個單位相同嗎?或者樣怎麼互換呢?
謝謝
--
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考試
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