Thermodynamics

1 calorie is equal to:

In gases, the speed of sound is inversely proportional to ______ of the density when other factors are the same.

The entropy of the universe always:

For adiabatic process, the First Law of Thermodynamics is:

The value of universal; Gas Constant 'R' is:

The pressure on the other sides and everywhere inside the vessel will be according to the:

Which one is not an irreversible process?

Which one of the following is a postulate of kinetic theory of gases?

The turbine in a steam power plant takes steam from a boiler at 427 °C and exhausts into a low temperature reservoir at 77 °C. What is the maximum possible efficiency?

The value of universal gas constant is:

Which of the following curve is an isotherm?

Pressure volume graph of two systems 'A' and 'B' are plotted under isothermal and adiabatic conditions. Which of the following observation of graph represents the two systems?

In which of the following, the change in internal energy is more?

First law of thermodynamics under adiabatic conditions can be mathematically written as:

A heat engine operating according to the second law of thermodynamics rejects one fourth of the heat taken from a high temperature reservoir. What is the percentage efficiency of a heat engine?

If ‘Q’ is the amount of heat supplied to a system and ‘W’ is the work done, then change in internal energy can be defined as:

H₂ and O₂ both are at thermal equilibrium at temperature 300 K. Oxygen molecule is 16 times massive than hydrogen. Root mean square speed of hydrogen is:

What is the value of universal gas constant?

For a heat engine ‘A’ the ratio of Q₂ to Q₁ is 2/3 while for that of heat engine ‘B’, the ratio of Q₂ to Q₁ is 1/3. What is the value η_A: η_B ?

What will be the mathematical form of the first law of thermodynamics for a system whose variation of volume by pressure is shown?

A gas sample contains three molecules each having speeds 1 ms^-1, 2 ms^-1, and 3 ms^-1. What is the mean square speed?

A heat engine working according to the second law of thermodynamics has 50% efficiency.What will be the temperature of its low-temperature reservoir if the high-temperaturereservoir is 327 K?

At the triple point of water, the pressure of a gas is 2680 Pa, by changing ‘T’ the pressure increases to 4870 Pa. Then ‘T’ is:

In ‘General Gas Equation PV=nRT’, ‘n’ represents the number of moles of gas. Which of the following represents the relation of ‘n’?

A gas containing ‘N’ number of molecules of a gas having mass of each molecule‘m’ is in a cubic container having length of each side ‘a’. What is the density of gascontained in a cube?

If heat ‘Q₁ is absorbed in temperature ‘T’ and heat ‘Q₂ is absorbed at temperature of the triple point of water, then the unknown temperature of the system (in K) is :

What is 273 K on the Celsius scale of temperature?

When the rate of a gas changes without a change in temperature, the gas is said to haveundergone:

If a turbine is working as a heat engine and takes heat from a hot body (427 °C) and exhausts it into a body at 77 °C, then what is the possible efficiency?

Which relation exactly describes the isothermal process?

The rapid escape of air from a burst tire is an example of

The relation PV = nRT shows which law of physics:

The relation R/N_A = 1.38 x 10-25 JK^-1 in a gas law is known as:

Isobaric processes occur at:

The value of pressure and volume of fixed mass of gas in thermometer at triple point of water P_f = 1.00 x 10⁵ Pa and V_f = 1 x 10^-3 m³. When P=1.1 x 10⁵ Pa and V=1.2 x 10^-3 m³. Then temperature of gas is:

1 mole of a gas occupies volume 1.00 x 10^-2 m³ in a gas cylinder whose pressure is equal to 2.50 x 10⁵ Pa. The temperature of cylinder is:

Estimate pressure of air molecules at 273 K, if mean square speed is 500 m²s^-2 and density of air is 6 kgm^-3:

If heat energy of 100 J is taken out but 400 J work is done on the system, the change in internal energy is:

During adiabatic compression work done is equal to 200 J. What will be the change in internal energy?

Find the mean translational kinetic energy of ideal hydrogen gas at 17 degrees Celsius.

If one mole of an ideal gas is heated at constant pressure, then the first law of thermodynamics can be written as:

If C_v = 5/2 R, C_p will be:

Molecules of a gas at constant pressure for a fixed amount of gas have average kinetic energy X. Increasing temperature from 27°C to 327°C, the average K.E. of molecules will become:

The sum of all forms of molecular energies (kinetic and potential) of a substance is termed as:

Temperature of given mass of a gas is changed from 150°C to 300°C during an isobaric process, volume of the gas will become:

When a gas is compressed isothermally, the product of its pressure and volume during the process is:

Thermodynamics is that branch of Physics in which we study

An ideal gas has molar specific heat Cp at constant pressure. When the temperature of n moles is increased by AT the increase in the internal energy is:

First law of thermodynamics concerns with the conservation of

For an ideal gas equation PV= nRT, the dimensions of Real Gas Constant R are:

What is the value of heat energy (Q) in an adiabatic process?

During the isothermal process, the temperature:

According to First law of thermodynamics when heat flows into a system and no work is done, the internal energy of the system must

One Calorie is equal to: