14.林同學從上表數據中,分析出一個可以約略推算其他正烷烴燃燒熱的方法。 又查表取得二氧化碳及水的莫耳
生成熱(ΔHf)依序分別為-393.5 kJ/mol 及-285.9 kJ/mol。 綜合這些數據林同學推算出正戊烷 的莫耳生成
熱,其約略數值可能為下列哪一個?
(A)+40
(B)+320
(C)-150
(D)-260
(E)-470 kJ/mol
(3) If the clockwise angular velocity of crankshaft AB is constant, which of the following statement is true?
(a) The angular velocity of BC is constant (b) The linear acceleration of point B is zero (c) The angular velocity of BC is
counterclockwise (d) The linear acceleration of point B is tangent to the path.