It is not a property of heat (Q) a. it is positive if it enters the...
It is not a property of heat (Q)
a. it is positive if it enters the system
b.it's a state function
c.is negative if it exits the system
d.is energy in transit
Homework Answers
(b) Heat is not a state function. Heat and work is a path function.
As per general sign convention heat is positive if it added to system and it is considered negative if it exit from system.
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It is not a property of heat (Q)
a. it is positive if it enters the...
Steam enters a counterflow heat exchanger operating at steady state at 0.07 MPa with a quality...
Steam enters a counterflow heat exchanger operating at steady state at 0.07 MPa with a quality of 0.9 and exits at the same pressure as saturated liquid. The steam mass flow rate is 1.3 kg/min. A separate stream of air with a mass flow rate of 100 kg/min enters at 30oC and exits at 60oC. The ideal gas model with cp = 1.005 kJ/kg·K can be assumed for air. Kinetic and potential energy effects are negligible. Determine the temperature of...
Warmup questions: (no points, but no penalty) A. If heat transfer is into the system, Q...
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Please show work for A 1-4! 1. Heat engines A heat engine is a device that...
Please show work for A 1-4!
1. Heat engines A heat engine is a device that does work by exchanging thermal energy with its environment. All heat engines operate in cycles during which a system, also known as the working substance, passes through a series of thermodynamic processes returning repeatedly to each state. A. Device 1, shown at right, represents a heat engine operating between 900 K reservoirs at 900 K and 400 K. (The system interacting with the reservoirs...
Problem 3 Steam enters a heat exchanger at 0.1 bar with a quality of 0.95 and...
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1. If q 60 kJ and w = 96 kJ for a certain process, that process...
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5. Steam at 140 bar and 600 °C enters a turbine at a mass flow rate...
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Thermodynamics: Valve and Heat Exchange 4.95
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Warmup questions: (no points, but no penalty) A. If heat transfer is into the system, Q will be positive B. If heat transfer is out of the system, Q will be [negative The actual problem 380 J of work are done on a gas while its volume is decreased. At the same time, the system's thermal energy decreases by 10 J. What is the absolute value of the heat transferred into (or out of) the system in this process? Enter...
Please show work for A 1-4!
1. Heat engines A heat engine is a device that does work by exchanging thermal energy with its environment. All heat engines operate in cycles during which a system, also known as the working substance, passes through a series of thermodynamic processes returning repeatedly to each state. A. Device 1, shown at right, represents a heat engine operating between 900 K reservoirs at 900 K and 400 K. (The system interacting with the reservoirs...
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Propane gas enters a continuous adiabatic heat exchanger 240°C. Superheated steam at 300 C and 5 bar enters the exchanger flowing countercurrently to the propane and exits as a saturated liquid at the same pressure at 40 C and 250 kPa and exits at Taking flow chart. Include both mass and volumes on your inlet and outlet streams. b. Calculate the specific enthalpy values for the inlet and outlet streams. c. Use an energy balance to calculate the required mass...
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