An ideal gas has a gas constant R = 0.3 kJ / kg K and the...
An ideal gas has a gas constant R = 0.3 kJ / kg K and the specific heat at constant volume is Cv = 0.7 kJ / Kg K. If the gas has a temperature change of 100 ° C. Choose the correct answer by making the corresponding calculations or justifications for each of the following cases:
The change in enthalpy in KJ / kg
a) 30 b) 70 c) 100 d) Insufficient information
The work done is in kJ / kg
a) 30 b) 70 c) 100 d) Insufficient information
Heat transfer in kJ / kg
a) 30 b) 70 c) 100 d) Insufficient information
The change in the pressure-volume product is, in kJ / kg
a) 30 b) 70 c) 100 d) Insufficient information
Homework Answers
A constant volume chamber of 0.3 capacity contains 2 kg of a gas (KJ/kg k, KJ/kg...
A constant volume chamber of 0.3
capacity contains 2 kg of a gas (KJ/kg
k,
KJ/kg k) at 5 deree c. Heat is transferred to the gas until the
temperature is 100 degree c. Find the heat transferred, and the
changes in enthalpy and entropy.
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and...
1)(Hint: Cp=1.005 kJ/kg-K, Cv=0.718 kJ/kg-K, R=0.287 kJ/kg-K). An air-tight room contains 80 kg of air, and a 2-kW baseboard electric resistance heater in the room is turned on and kept on for 15 min. The temperature rise of air at the end of 15 min is 2)An example of when it is appropriate to model a substance as an ideal gas is when a. The pressure and temperature are close to the critcal point b. The pressure and temperature are...
thermodynamics please help asap An ideal gas with constant heat capacity (C 1 kJ/kg K, R-0.3...
thermodynamics please help asap
An ideal gas with constant heat capacity (C 1 kJ/kg K, R-0.3 kJ/kg K) is to be adiabatically compressed, heated, then expanded in the steady flow system shown below. The compressor and turbine are adiabatic and reversible and kinetic and potential energy effects are negligible. (a) Find the power (kW) required by the compressor. (b) Find the power (kW) delivered by the turbine. Q800 kJ/s P8 barsheat exchanger turbine compressor P- 1 bar Tjs280K P?s 1...
constant specife heats An ideal gas wit of cp .1 kJ/(kg K) and c 0.75 kJ/(kg...
constant specife heats An ideal gas wit of cp .1 kJ/(kg K) and c 0.75 kJ/(kg K) is contained in the piston-cylinder device shown. Initially, the vol- ume is 50 cm3 and the temperature is 20°C. How much heat must be added to double the volume if the final pressure and temperature are 400 kPa and 1000 K respectively. g·K) and Cu- Ideal gas Linear spring
17) If 100 kJ is added to 0.5 kg of air at constant volume and the...
17) If 100 kJ is added to 0.5 kg of air at constant volume and the inia od l gresure. 30°C and 200 kPa, and Cv 0.7 kJkg"K, determine the temperature, and the change in entro for the process. (MW-29) 00K 0.
I only need the cycle thermal efficiency solved Required information An ideal gas is contained in...
I only need the cycle thermal
efficiency solved
Required information An ideal gas is contained in a piston-cylinder device and undergoes a power cycle as follows: 1-2 Isentropic compression from an initial temperature T1 20°C with a compression ratio r 6.5 2-3 Constant-pressure heat addition 3-1 Constant-volume heat rejection The gas has constant specific heats with cv- 0.7 kJ/kg.K and R 0.3 kJ/kg-K. Determine the heat and work interactions for each process, in kJ/kg. (You must provide an answer before...
Er<E EF E E> E) W>0) and Polytropic PathsSpcl Cases for Ideal Gas n 0 constant...
Er<E EF E E> E) W>0) and Polytropic PathsSpcl Cases for Ideal Gas n 0 constant pressure n 1 constant temperature n k constant entropy, adiabatic (q 0) n constant volume and W<0 W 0 For air R 0.287 kJ/kg-K and k Cp/Cv 1.4 if pi 300 kPa, v, 0.861 m3/kg then T, 900 K For T Ta if pa /p 3 then va = m2/kg pv RT and (T, n/(n-1) p2 V1 For vi v if po /p1 3...
Question 5 (2.0 pts) Assume that Cp for an ideal gas is given by co(T) =...
Question 5 (2.0 pts) Assume that Cp for an ideal gas is given by co(T) = 0.9 + 2.5 x 10-* T, in kJ/kg-K, where is the temperature in Kelvin. (Use the gas constant R = 0.3 kJ/kg-K) (a) (+0.4) Derive an expression for Cy as a function of temperature. The gas undergoes an isochoric process from a temperature T, = 400 K to T2 = 500 K. Calculate the change in (b) (+0.6) enthalpy, in kJ/kg, (c) (+0.6) entropy,...
Consider 0.7 kg of N2 at 300 K, 1 bar contained in a rigid tank connected by a valve to another r...
Consider 0.7 kg of N2 at 300 K, 1 bar contained in a
rigid tank connected by a valve to another rigid tank holding 0.3
kg of CO2 at 300 K, 1 bar. The valve is opened and gases
are allowed to mix, achieving an equilibrium state at 280 K.
Determine:
(a) the volume of each tank, in m3.
(b) the final pressure, in bar.
(c) the magnitude of the heat transfer to or from the gases during
the process,...
Nitrous oxide (N2O) behaves as an ideal gas and has a heat capacity at constant pressure...
Nitrous oxide (N2O) behaves as an ideal gas and has a heat capacity at constant pressure CP = 38.6 J/K∙mol. 4.2 moles of N2O initially at 298 K are heated at constant pressure until a final temperature of 358 K is reached. (a) Calculate the enthalpy change of N2O during that process. (b) Calculate the heat transfer Q during that process. (c) Calculate the work W performed during that process. (d) Calculate the change in internal energy ΔU during that...
A constant volume chamber of 0.3
capacity contains 2 kg of a gas (KJ/kg
k,
KJ/kg k) at 5 deree c. Heat is transferred to the gas until the
temperature is 100 degree c. Find the heat transferred, and the
changes in enthalpy and entropy.
thermodynamics please help asap
An ideal gas with constant heat capacity (C 1 kJ/kg K, R-0.3 kJ/kg K) is to be adiabatically compressed, heated, then expanded in the steady flow system shown below. The compressor and turbine are adiabatic and reversible and kinetic and potential energy effects are negligible. (a) Find the power (kW) required by the compressor. (b) Find the power (kW) delivered by the turbine. Q800 kJ/s P8 barsheat exchanger turbine compressor P- 1 bar Tjs280K P?s 1...
constant specife heats An ideal gas wit of cp .1 kJ/(kg K) and c 0.75 kJ/(kg K) is contained in the piston-cylinder device shown. Initially, the vol- ume is 50 cm3 and the temperature is 20°C. How much heat must be added to double the volume if the final pressure and temperature are 400 kPa and 1000 K respectively. g·K) and Cu- Ideal gas Linear spring
17) If 100 kJ is added to 0.5 kg of air at constant volume and the inia od l gresure. 30°C and 200 kPa, and Cv 0.7 kJkg"K, determine the temperature, and the change in entro for the process. (MW-29) 00K 0.
I only need the cycle thermal
efficiency solved
Required information An ideal gas is contained in a piston-cylinder device and undergoes a power cycle as follows: 1-2 Isentropic compression from an initial temperature T1 20°C with a compression ratio r 6.5 2-3 Constant-pressure heat addition 3-1 Constant-volume heat rejection The gas has constant specific heats with cv- 0.7 kJ/kg.K and R 0.3 kJ/kg-K. Determine the heat and work interactions for each process, in kJ/kg. (You must provide an answer before...
Er<E EF E E> E) W>0) and Polytropic PathsSpcl Cases for Ideal Gas n 0 constant pressure n 1 constant temperature n k constant entropy, adiabatic (q 0) n constant volume and W<0 W 0 For air R 0.287 kJ/kg-K and k Cp/Cv 1.4 if pi 300 kPa, v, 0.861 m3/kg then T, 900 K For T Ta if pa /p 3 then va = m2/kg pv RT and (T, n/(n-1) p2 V1 For vi v if po /p1 3...
Question 5 (2.0 pts) Assume that Cp for an ideal gas is given by co(T) = 0.9 + 2.5 x 10-* T, in kJ/kg-K, where is the temperature in Kelvin. (Use the gas constant R = 0.3 kJ/kg-K) (a) (+0.4) Derive an expression for Cy as a function of temperature. The gas undergoes an isochoric process from a temperature T, = 400 K to T2 = 500 K. Calculate the change in (b) (+0.6) enthalpy, in kJ/kg, (c) (+0.6) entropy,...
Consider 0.7 kg of N2 at 300 K, 1 bar contained in a
rigid tank connected by a valve to another rigid tank holding 0.3
kg of CO2 at 300 K, 1 bar. The valve is opened and gases
are allowed to mix, achieving an equilibrium state at 280 K.
Determine:
(a) the volume of each tank, in m3.
(b) the final pressure, in bar.
(c) the magnitude of the heat transfer to or from the gases during
the process,...
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