LMS

If two objects are in thermal equilibrium with each other 

The first law of thermodynamics is concerned with conservation of  

If a cup of tea is at 500C is allowed to cool to room temperature, heat released would be (assume room temperature to be equal to 25 ^o C and heat capacity of cup and tea to be 5.0 Kj/K)

If 20J of work is done in compressing a gas adiabatically the change in internal energy is equal to

During adiabatic compression of a gas its temperature

A system does 600J of work at the same time has its internal energy increased by 320J. How much heat has been supplied?

In a certain process, 400J of heat energy is supplied to a system and at the same time 150 J of work is done by the system. What is the increase in internal energy of the system?

The direction of flow of heat between two bodies is determined by

Pressure versus volume graphs for a certain gas undergoing different cyclic processes are shown below. During which cycle does the gas do the greatest positive work?

Heat is.

Two different samples have the same mass and temperature. Equal quantities of energy are absorbed as heat by each. Their final temperatures may be different because the samples have different

If  then Cp in 

The equation  represents a process

Starting with the same initial conditions, an ideal gas expands from volume V1 to V2 in three different ways. The work done by the gas is W1 if the process is purely isothermal, W2 if purely isobaric and W3 if purely adiabatic. Then

A system undergoes an adiabatic process in which its internal energy increases by 20 J. Which of the following statements is true?

In an adiabatic process, constant; the value ‘g’ is

In an adiabatic process

A gas in an insulated cylinder is compressed rapidly and its internal energy increases by 25 J. Work done during this process is

If volume of gas is doubled without changing its temperature, the pressure of gas is 

In which process the P–V indicator diagram is straight line parallel to volume axis?

The figure shows the P-V diagram of a cyclic process. If DQ is the heat energy supplied to the system, DU is the internal energy of the system and DW is the work done by the system, then which of the following relations is correct?

If the heat capacity of a 10g of a substance is 300 JK-1 then the heat capacity of 100g ____________of same substance would be equal to 

The difference between the molar specific heat at constant pressure and the molar specific heat at constant volume for an ideal gas is:

The amount of heat energy required to raise the temperature of a body of mass 1 kg through 1 k is called: 

Specific heat capacity of a substance is equal to 

The first law of thermodynamics can be stated in the form U = Q – W. Which of the quantities U, Q and W are necessarily zero when the system is an ideal gas that undergoes a change at constant temperature?

What is the molar specific heat of a isothermal & adiabatic process respectively

We can express the work in terms of

A cycle tyre bursts suddenly. This represents an 

CV of a gas is 8 cal/Kmol. Find CP/CV. Assume R = 2 cal/Kmol.

An isochoric process is one which take place at

Heat leaves the system is taken as

If 315cal of heat is given to the system, and the system does 20cal of work, find the change in internal energy.

As  shows that. What is also true?

Internal energy of a system is defined as

Suppose volume of gas in a cylinder is 3 cm³, if the piston is kept fixed and gas is heated from 5 ^o C to 12 ^o C then the work done is                  

In a science lab a student heats up a chemical from10 ^o C to 25 ^o C which requires thermal energy of 30000J.If the mass of object is 40 k, the specific heat capacity of the chemical would be         

In an adiabatic process 

The heat capacity of sodium metal is 1500 J/K, if the mass of the sodium metal is 75 kg, the specific heat capacity would be 

Which one is not adiabatic process 

The internal energy comprises of two types of energies, those are  

Heat energy added to a system under isothermal conditions appears as 

The area under a curve on P–V diagram represents 

A gas undergoes the cycle of pressure and volume changesshown in the diagram.What is the net work done by the gas?

In the figure curves AB and CD represent the relation between pressure P and volume V of an ideal gas. One of the curves represents on isothermal expansion and the other represents an adiabatic expansion. Which curve represents an adiabatic expansion?

A gas is compressed at a constant pressure of 50N/m²from a volume of 10m³ to a volume of 4m³. Energy of 100 J then added to the gas by heating. Its internal energy is

Work done by air when it expands from 50 litres to 150 litres at a constant pressure of 2 atmospheres is

A milkman boils the milk before distributing it in the pots. He raises the temperature of the milk from 10 °C to 130 °C with the thermal energy of 120000 J. If the mass of the milk is 25 kg, the specific heat capacity of the milk would be

Which of the following represents an isothermal expansion.

If the amount of heat given to a system to 35J and amount of work done by the system is -15J then the change in the internal energy of the system is