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氫氣加熱時..壓力的問題

Nov 23rd 2014, 21:48

1.纯氫氣(99.95%)放入一密閉容器中.溫度攝氏t1=25度.壓力P1=1大氣壓.將此容

器加熱至攝氏t2=50度..密閉容器內.壓力是多少?

理想氣體裡面,容積.質量.分子量=固定 => P與T成正比例:

P2=P1*T2/T1

=1(atm)*(273+50)/(273+25)

=323/298

=1.084(atm)

2.至攝氏100度..密閉容器內.壓力是多少?

P3=1*373/298=1.252(atm)

3.至攝氏150度..密閉容器內.壓力是多少?

P4=1*423/298=1.419(atm)

4.至攝氏200度..密閉容器內.壓力是多少?

P5=1*473/298=1.587(atm)

5.或者說有一套計算氫氣受熱膨脹的計算壓力方式呢?

理想氣體公式: P=q*Ru*T/M

q=密度(kg/m^3)

Ru=宇宙企氣體常數=8.314(J/k.mole)

T=絕對溫度=273+攝氏溫度

M=分子量/1000 (kg/mole)

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