Question

Page 2 of 2 Problem 1 A 1.2 m³ rigid tank initially contains air (as an ideal gas) at 100 kPa and 25°C. The tank is connected to a supply line through a valve. Air is flowing in the supply line at 650 kPa and 25°C. The valve is opened and air is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. Air $P_L = 650 \text{ kPa}$ $T_L = 25 ^\circ C$ Determine: a) The flow work (i.e. $P_v$) of the air in the supply line $P_1 = 100 \text{ kPa}$ $T_1 = 25 ^\circ C$ b) The final temperature of the tank if $u_2$ equals to 250.02 kJ/kg. c) The initial mass ($m_1$), final mass ($m_2$), and mass enter ($m_{in}$) d) The amount of heat transfer (in kJ). Is heat added or removed?

          Page 2 of 2
Problem 1
A 1.2 m³ rigid tank initially contains air (as an ideal gas)
at 100 kPa and 25°C. The tank is connected to a supply
line through a valve. Air is flowing in the supply line at
650 kPa and 25°C. The valve is opened and air is allowed
to enter the tank until the pressure in the tank reaches the
line pressure, at which point the valve is closed.
Air
$P_L = 650 \text{ kPa}$
$T_L = 25 ^\circ C$
Determine:
a) The flow work (i.e. $P_v$) of the air in the supply line
$P_1 = 100 \text{ kPa}$
$T_1 = 25 ^\circ C$
b) The final temperature of the tank if $u_2$ equals to 250.02 kJ/kg.
c) The initial mass ($m_1$), final mass ($m_2$), and mass enter ($m_{in}$)
d) The amount of heat transfer (in kJ). Is heat added or removed?

Page 2 of 2
Problem 1
A 1.2 m³ rigid tank initially contains air (as an ideal gas)
at 100 kPa and 25°C. The tank is connected to a supply
line through a valve. Air is flowing in the supply line at
650 kPa and 25°C. The valve is opened and air is allowed
to enter the tank until the pressure in the tank reaches the
line pressure, at which point the valve is closed.
Air
PL = 650 kPa
TL = 25 ^∘ C
Determine:
a) The flow work (i.e. Pv) of the air in the supply line
P1 = 100 kPa
T1 = 25 ^∘ C
b) The final temperature of the tank if u2 equals to 250.02 kJ/kg.
c) The initial mass (m1), final mass (m2), and mass enter (min)
d) The amount of heat transfer (in kJ). Is heat added or removed?

Added by Amber J.

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