Page 20 - eEC00510_化工裝置 I_課本PDF

化工裝置 I

1-4

試求 1Pa( )= ( ) ？ ( )？ psi ( )？

2
1Pa( )=1 × × ( ) =1 × ×

= ( )=10 ( )

=1 × × ( ) =1 × ×
2

= ( ) = 1.02×10 5 ( )
×
=1 × × × ( ) 2 ∴1lb f =4.45N

=1 × × ×

= ( ) = 1.45×10 4 ( ) = 1.45×10 4 psi。
×

1-5

試求熱傳導度（k）的換算 1( )= ( ) ？ ( ) ？

1( )=1 × × × ×

×
= ( ) = 0.413 ( )
×
×
=0.413 × × =

=1.73( ) = 1.73 ( )。

1-6

證明 1Btu= cal？

1Btu 為 1 磅的水升高 1°F 所需的熱量。
453.6
= × × = ( )=252( )
1.8
1 Btu = 252 cal。
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