Homework Answers
Every system has a definite amount of energy that is called internal energy (represented as E or U)
The internal energy of given system in generally increased if we increase the temperature, that means system being heated or work is carried out on the system by the surroundings.
- if temperature is increased
- if work is carried out on the system
Then internal energy always increases.
2. There exists a form of energy, known as internal energy U, which is an intrinsic...
2. There exists a form of energy, known as internal energy U, which is an intrinsic property of a system, functionally related to the measureable coordinates which characterize the system. Write the formula to describe changes in this property for a closed system, not in motion. Describe the concept of internal energy. What is the energy source of the internal energy? Does it change along with the process?
The internal energy, U, is the total energy of a system. For any isolated system, the...
The internal energy, U, is the total energy of a system. For any isolated system, the internal energy is constant. U is a state function, meaning that any path used in calculating AU ill result in the same answer. For any pure substance or fixed mixture of substances, the internal energy, U, can be determined from any two of the variablesP, V, and T. It is often most convenient to choose V and T as the variables. It is helpful,...
Match the type of energy with the descriptions (Use work, heat or internal energy to describe...
Match the type of energy with the descriptions (Use work, heat or internal energy to describe them.): a. Sum of the kinetic and potential energies of the system's atoms. b. U is the symbol. c. Energy transferred due to temperature difference. d. Increased molecular motion increases this type of energy. e. Energy used in a system to create motion.
What is the change in internal energy of a system (?U) if for a process the...
What is the change in internal energy of a system (?U) if for a process the system absorbs 71 kJ of thermal energy and the system performs 12 kJ of work? a. 59 kJ b.71 kJ c. 383 kJ d. –83 kJ e. –59 kJ
The multiplicity of a system of N quantum oscillators with the total internal energy U and...
The multiplicity of a system of N quantum oscillators with the total internal energy U and energy quantum a is Ω(,- ,N) = and q 1 and use Stirling's approximation, N(N), to derive U (T, N). You can replace N-1 with N in multiplicity equation to simplify writing given that N1 (N-1+9)!. Assume that both N » 1
Learning Goal Internal Energy of an ideal gas The internal energy of a system is the...
Learning Goal Internal Energy of an ideal gas The internal energy of a system is the energy stored in the system. In an ideal gas, the internal energy includes the kinetic energies (translational and rotational) of all the molecules, and other energies due to the interactions among the molecules. The internal energy is proportional to the Absolute Temperature T and the number of moles n (or the number of molecules N). n monatomic ideal gases, the interactions among the molecules...
2. Consider free expansion of a gas when the internal energy U remains constant. Derive: a) the e...
2. Consider free expansion of a gas when the internal energy U remains constant. Derive: a) the expression for (дт/avJu in terms of P, T, Cv and (ap/aT)v b) the expression for (as/aV)u in terms of P and T c) using equations obtained in a) and b) calculate (expression for) the change of temperature AT and change of entropy AS for a free gas expansion from Vi to V2.
2. Consider free expansion of a gas when the internal energy...
How will you solve? system's intemal energy by 354 J The internal energy of a system...
How will you solve?
system's intemal energy by 354 J The internal energy of a system increases by 468 J, while losing 345 J of heat.How much egy transferred by work? heat is increased by 145 J, while it does 189 J of work, What is the change in the systems internal energy?
The internal energy of a certain ideal gas is given by the experssion U=850+0.529pv btu/lb where...
The internal energy of a certain ideal gas is given by the experssion U=850+0.529pv btu/lb where p is in psia. determine the exponent k in pv^k=C for this gas undergoing an isentropic process.
Internal Energy of a gas, ldeal Gas Law 1. The average kinetic energy of a molecule,...
Internal Energy of a gas, ldeal Gas Law 1. The average kinetic energy of a molecule, is called thermal energy, it is directly related to absolute temperature. 1 3 KE (average per molecule) mv(average) =kT (kg =1.38x10-23 J/K) 3KBT 2. The average speed of molecules in a gas: vrms+ т where vrms stands for root-mean-square (rms) speed. 3. The INTERNAL ENERGY of a gas is the TOTAL ENERGY of ALL the N atoms and molecules For a MONATOMIC gas, each...
2. There exists a form of energy, known as internal energy U, which is an intrinsic property of a system, functionally related to the measureable coordinates which characterize the system. Write the formula to describe changes in this property for a closed system, not in motion. Describe the concept of internal energy. What is the energy source of the internal energy? Does it change along with the process?
The internal energy, U, is the total energy of a system. For any isolated system, the internal energy is constant. U is a state function, meaning that any path used in calculating AU ill result in the same answer. For any pure substance or fixed mixture of substances, the internal energy, U, can be determined from any two of the variablesP, V, and T. It is often most convenient to choose V and T as the variables. It is helpful,...
The multiplicity of a system of N quantum oscillators with the total internal energy U and energy quantum a is Ω(,- ,N) = and q 1 and use Stirling's approximation, N(N), to derive U (T, N). You can replace N-1 with N in multiplicity equation to simplify writing given that N1 (N-1+9)!. Assume that both N » 1
Learning Goal Internal Energy of an ideal gas The internal energy of a system is the energy stored in the system. In an ideal gas, the internal energy includes the kinetic energies (translational and rotational) of all the molecules, and other energies due to the interactions among the molecules. The internal energy is proportional to the Absolute Temperature T and the number of moles n (or the number of molecules N). n monatomic ideal gases, the interactions among the molecules...
2. Consider free expansion of a gas when the internal energy U remains constant. Derive: a) the expression for (дт/avJu in terms of P, T, Cv and (ap/aT)v b) the expression for (as/aV)u in terms of P and T c) using equations obtained in a) and b) calculate (expression for) the change of temperature AT and change of entropy AS for a free gas expansion from Vi to V2.
2. Consider free expansion of a gas when the internal energy...
How will you solve?
system's intemal energy by 354 J The internal energy of a system increases by 468 J, while losing 345 J of heat.How much egy transferred by work? heat is increased by 145 J, while it does 189 J of work, What is the change in the systems internal energy?
Internal Energy of a gas, ldeal Gas Law 1. The average kinetic energy of a molecule, is called thermal energy, it is directly related to absolute temperature. 1 3 KE (average per molecule) mv(average) =kT (kg =1.38x10-23 J/K) 3KBT 2. The average speed of molecules in a gas: vrms+ т where vrms stands for root-mean-square (rms) speed. 3. The INTERNAL ENERGY of a gas is the TOTAL ENERGY of ALL the N atoms and molecules For a MONATOMIC gas, each...
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