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小 發表於 2015-12-2 10:54 AM (第 3068 天) 只看該作者
Phy heat 題目 求解+ans
Q1 A cylinder is closed by a piston connected to a spring of constant 2.40 x 103 N/m. With the spring relaxed, the cylinder is filled with 5.00 L of gas at a pressure of 1.00 atm and a temperature of 20.0°C.
a) If the piston has a cross-sectional area of 0.0130 m2 and negligible mass, how high (in meter) will it rise when the temperature is raised to 250°C?b) The pressure of the gas at 250°C = __ × 105 P
Q2
In the figure below, a 1.00 mol monatomic ideal gas is taken through the cycle. At point A, the pressure, volume, and temperature are Pi , Vi , and Ti , respectively. (Answer the following questions in terms of R and Ti.)
a) Find the total energy entering the system by heat per cycle.
_?_ × nRTi
b) Find the total energy leaving the system by heat per cycle.
?__ × nRTi
c) Find the efficiency of an engine operating in this cycle.
[ 本帖最後由 abcdefi 於 2015-12-2 09:08 PM 編輯 ]
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