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प्रश्न
The first law of thermodynamics is concerned with the conservation of ______.
The first law of thermodynamics is consistent with the law of conservation of ______.
विकल्प
momentum
energy
temperature
mass
velocity
उत्तर १
The first law of thermodynamics is concerned with the conservation of energy.
Explanation:
The First Law of Thermodynamics states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy. This means that heat energy cannot be created or destroyed.
उत्तर २
The first law of thermodynamics is consistent with the law of conservation of energy.
संबंधित प्रश्न
Write the mathematical expression of the First Law of Thermodynamics for the Isobaric process.
The first law of thermodynamics is a statement of ____________ .
A system can be taken from the initial state p1, V1 to the final state p2, V2 by two different methods. Let ∆Q and ∆W represent the heat given to the system and the work done by the system. Which of the following must be the same in both the methods?
A thermally insulated, closed copper vessel contains water at 15°C. When the vessel is shaken vigorously for 15 minutes, the temperature rises to 17°C. The mass of the vessel is 100 g and that of the water is 200 g. The specific heat capacities of copper and water are 420 J kg−1 K−1 and 4200 J kg−1 K−1 respectively. Neglect any thermal expansion. (a) How much heat is transferred to the liquid-vessel system? (b) How much work has been done on this system? (c) How much is the increase in internal energy of the system?
Figure shows the variation in the internal energy U with the volume V of 2.0 mol of an ideal gas in a cyclic process abcda. The temperatures of the gas at b and c are 500 K and 300 K respectively. Calculate the heat absorbed by the gas during the process.
An adiabatic vessel of total volume V is divided into two equal parts by a conducting separator. The separator is fixed in this position. The part on the left contains one mole of an ideal gas (U = 1.5 nRT) and the part on the right contains two moles of the same gas. Initially, the pressure on each side is p. The system is left for sufficient time so that a steady state is reached. Find (a) the work done by the gas in the left part during the process, (b) the temperature on the two sides in the beginning, (c) the final common temperature reached by the gases, (d) the heat given to the gas in the right part and (e) the increase in the internal energy of the gas in the left part.
Choose the correct option.
Which of the following is an example of the first law of thermodynamics?
ΔU is equal to ____________ work.
10 kg of four different gases (Cl2, CH4, O2, N2) expand isothermally and reversibly from 20 atm to 10 atm. The order of amount of work will be ____________.
The compressibility of water is 5 × 10-10 m2/N. Pressure of 15 × 106 Pa is applied on 100 ml volume of water. The change in the volume of water is ______.
"The mass and energy both are conserved in an isolated system", is the statement of ______.
In a given process for an ideal gas, dW = 0 and dQ < 0. Then for the gas ____________.
For a particular reaction, the system absorbs 8 kJ of heat and does 2.5 kJ of work on its surrounding. What will be the change in internal energy of the system?
Consider two containers A and B containing identical gases at the same pressure, volume and temperature. The gas in container A is compressed to half of its original volume isothermally while the gas in container B is compressed to half of its original value adiabatically. The ratio of final pressure of gas in B to that of gas in A is ______.
Three copper blocks of masses M1, M2 and M3 kg respectively are brought into thermal contact till they reach equilibrium. Before contact, they were at T1, T2, T3 (T1 > T2 > T3). Assuming there is no heat loss to the surroundings, the equilibrium temprature T is (s is specific heat of copper)
Write the mathematical equation for the first law of thermodynamics for:
Adiabatic process
The first law of thermodynamics for isothermal process is ______.
Which among the following equations represents the first law of thermodynamics under isobaric conditions?
If one mole of monoatomic gas `(gamma=5/3)` is mixed with one mole of diatomic gas `(gamma=7/5)`, the value of γ for the mixture is ______.
The amount of work done in increasing the voltage across the plates of capacitor from 5 V to 10 V is W. The work done in increasing it from 10 V to 15 V will be ______.
The V cc volume of gas having `γ = 5/2` is suddenly compressed to `(V/4)` cc. The initial pressure of the gas is p. The final pressure of the gas will be ______.
A given system undergoes a change in which the work done by the system equals the decrease in its internal energy. The system must have undergone an ______.
Derive an expression for the work done during an isothermal process.
If the adiabatic ratio for a gas is 5/3, find the molar specific heat capacity of the gas at (i) constant volume (ii) constant pressure.
Using the first law of thermodynamics, show that for an ideal gas, the difference between the molar specific heat capacities at constant pressure and at constant volume is equal to the molar gas constant R.
Show that the heat absorbed at constant pressure is equal to the change in enthalpy of the system.
Calculate work done when 2 moles of ideal gas expands by 5 dm3 isothermally at pressure 1.2 bar.
Define the isothermal process.
