Homework Answers
Open system
the volume of the system is fixed and it involved mass as well as energy interaction.
Close System
In this system, the mass of the system is fixed as well as identity is fixed. it involves energy interaction but no mass interaction.
Adiabatic process
Adiabatic process are those process in which no heat exchange
occurs.
Sign Convention
1. Heat coming into the system is positive, Q>0.
2. Heat goes out from the system to be negative, Q<0.
3. Work done on the system is negative, W<0.
4. Work done by the system is positive, W>0.
Q= 250 J
W= 250 J
50 kCal -100 kCal = -50 kCal
Add Answer to:
2. What do the terms closed system and open system mean? What is an adiabatic process?...
Part A An ideal gas expands through an adiabatic process. Which of the following statements is/are true? Check all that...
Part A An ideal gas expands through an adiabatic process. Which of the following statements is/are true? Check all that apply. Check all that apply. The work done by the gas is negative, and heat must be added to the system. The work done by the gas is positive, and no heat exchange occurs. The internal energy of the system has increased. The internal energy of the system has decreased. SubmitHintsMy AnswersGive UpReview Part Incorrect; Try Again; 5 attempts remaining...
Suppose the work done to compress a gas is 100 J. If 70 J of heat...
Suppose the work done to compress a gas is 100 J. If 70 J of heat is lost in the process, what is the change in the internal energy of the gas? Hint: Use the first law of thermodynamics. The internal energy of a system changes due to heat (Q) and work (W): U=Q-W. The change in internal energy is equivalent to the difference between the heat added to the system and the work done by the system. Think if...
One mole of an ideal gas in a closed system undergoes a mechanically reversible adiabatic compression...
One mole of an ideal gas in a closed system undergoes a mechanically reversible adiabatic compression process and changes from V1= 0.05 m^3 and P1= 1 bar to P2= 12 bar. Calculate Q, W, ∆U, and ∆H of the process. If the process will become irreversible with 50% efficiency, calculate the W, Q, ∆U, and ∆H.
10,000 kg/hr of air at 500*C and 40 atm through an adiabatic turbine at 250 m/s....
10,000 kg/hr of air at 500*C and 40 atm through an adiabatic turbine at 250 m/s. the air exits the turbine at 2 atm and 50 m/s. The turbine needs to produce 1 MW of work. The heat capacity of air is 1 kJ/kg-K. - is this an open or closed system? - choose all the terms of energy balance equation: internal energy change, KE change, PE change, heat, shaft work, enthalpy change, pressure change over density, friction - what...
In process A, 48 J of work are done on the system and 72 J of...
In process A, 48 J of work are done on the system and 72 J of heat are added to the system. Find the change in the system's internal energy. In process B, the system does 48 J of work and 72 J of heat are added to the system. What is the change in the system's internal energy? In process C, the system's internal energy decreases by 129 J while the system performs 129 J of work on its...
Three different processes act on a system. In process A, 53 J of work are done...
Three different processes act
on a system. In process A, 53 J of work are done on the system and
77 J of heat are added to the system. Find the change in the
system's internal energy. In process B, the system does 53 J of
work and 77 J of heat are added to the system. What is the change
in the system's internal energy? In process C, the system's
internal energy decreases by 125 J while the system...
Extra Credit: 1. (2 points) In an adiabatic process, a system is thermally insulated - there...
Extra Credit: 1. (2 points) In an adiabatic process, a system is thermally insulated - there is no exchange of heat between system and surroundings. For the adiabatic expansion of an ideal gas a. Does the internal energy of the gas increase, decrease, or remain the same? Explain: b. What happens to the temperature of the gas? Explain.
A system undergoes a two-step process. In the first step, the internal energy of the system...
A system undergoes a two-step process. In the first step, the internal energy of the system increases by 232 J when 166 J of work is done on the system. In the second step, the internal energy of the system increases by 115 J when 159 J of work is done on the system. For the overall process, find the heat added to the system (including sign).
A system undergoes a two-step process. In the first step, the internal energy of the system...
A system undergoes a two-step process. In the first step, the internal energy of the system increases by 226 J when 166 J of work is done on the system. In the second step, the internal energy of the system increases by 115 J when 165 J of work is done on the system. For the overall process, find the heat added to the system (including sign).
A system undergoes a two-step process. In the first step, the internal energy of the system...
A system undergoes a two-step process. In the first step, the internal energy of the system increases by 239 J when 166 J of work is done on the system. In the second step, the internal energy of the system increases by 115 J when 177 J of work is done on the system. For the overall process, find the heat added to the system (including sign).
Three different processes act
on a system. In process A, 53 J of work are done on the system and
77 J of heat are added to the system. Find the change in the
system's internal energy. In process B, the system does 53 J of
work and 77 J of heat are added to the system. What is the change
in the system's internal energy? In process C, the system's
internal energy decreases by 125 J while the system...
Extra Credit: 1. (2 points) In an adiabatic process, a system is thermally insulated - there is no exchange of heat between system and surroundings. For the adiabatic expansion of an ideal gas a. Does the internal energy of the gas increase, decrease, or remain the same? Explain: b. What happens to the temperature of the gas? Explain.
Most questions answered within 3 hours.
-
Write a program to solve the Josephus problem, with the following
modification:
Sample Input:
./a.out n...
asked 1 hour ago -
At the start of a CD it is spinning at a rate of 525 rpm
(revolutions...
asked 1 hour ago -
4. Without doing any calculations, predict whether the observed
∆T would increase, decrease or remain the...
asked 3 hours ago -
Based on the range, which of the following sets of scores has
the greatest variability? 3,...
asked 4 hours ago -
Ripples in a pond travel at a velocity of 3 m/s with one peak
passing a...
asked 4 hours ago -
A man stands on the roof of a building of height 13.0 mm and
throws a...
asked 4 hours ago -
The extent to which assets are financed by borrowed funds and
other liabilities is indicated by:...
asked 5 hours ago -
Explain in detail
Germany is the fifth largest economy
explain what goods and services Germany specializes...
asked 5 hours ago -
The density of platinum is 21.45 g/mL. If a cube of platinum
with a mass of...
asked 5 hours ago -
Accounts Receivable
Sales
A/R Posting
Extended Sales Invoice
Packing Slip
Compare invoice to packing slip 2...
asked 5 hours ago -
Michaella, age 23, is a full-time law student and is claimed by
her parents as a...
asked 5 hours ago -
Why are polymers not typically casted into products?
asked 5 hours ago