Physics
Heat
Easy
Question
If 150 J of heat is added to a system and the work done by the system is 110 J, then change in internal energy will be
- 260 J
- 150 J
- 110 J
- 40 J
The correct answer is: 40 J
Related Questions to study
Physics
A perfect gas contained in a cylinder is kept in vacuum. If the cylinder suddenly bursts, then the temperature of the gas
A perfect gas contained in a cylinder is kept in vacuum. If the cylinder suddenly bursts, then the temperature of the gas
PhysicsHeat
Physics
A thermodynamic process of one mole ideal monoatomic gas. The efficiency of cyclic process ABCA will be
A thermodynamic process of one mole ideal monoatomic gas. The efficiency of cyclic process ABCA will be
PhysicsHeat
Physics
A sample of an ideal gas is taken through a cycle a shown in figure. It absorbs
50 J of energy during the process AB, no heat during BC, rejects 70 J during
CA. 40J of work is done on the gas during BC . Internal energy of gas at A is 1500 J, the internal energy at C would be
A sample of an ideal gas is taken through a cycle a shown in figure. It absorbs
50 J of energy during the process AB, no heat during BC, rejects 70 J during
CA. 40J of work is done on the gas during BC . Internal energy of gas at A is 1500 J, the internal energy at C would be
PhysicsHeat
Physics
A tyre pumped to a pressure 3.375 atm at 27oC suddenly burts. What is the final temperature 
A tyre pumped to a pressure 3.375 atm at 27oC suddenly burts. What is the final temperature
PhysicsHeat
Physics
When 1 mole of a monatomic gas is mixed with 3 moles of a diatomic gas , the value of adiabatic exponent 
for the mixture is :
When 1 mole of a monatomic gas is mixed with 3 moles of a diatomic gas , the value of adiabatic exponent for the mixture is :
PhysicsHeat
Physics
The molar heat capacity of a gas in a process
The molar heat capacity of a gas in a process
PhysicsHeat
Physics
A fixed mass of a gas is adiabatically made to expand to double its volume and then isochorically heated to bring the gas to the original pressure . The ratio of final to initial temperature will be
A fixed mass of a gas is adiabatically made to expand to double its volume and then isochorically heated to bring the gas to the original pressure . The ratio of final to initial temperature will be
PhysicsHeat
Physics
Find the amount of work done to increase the temperature of one mole of an ideal gas by 30°C , if it is expanding under condition 
. R is gas constant
Find the amount of work done to increase the temperature of one mole of an ideal gas by 30°C , if it is expanding under condition . R is gas constant
PhysicsHeat
Physics
During an experiment an ideal gas is found to obey an additional law VP2 = constant. The gas is initially at temperature T and volume V. What wiII be the temperature of the gas when it expands to a volume 2V?
During an experiment an ideal gas is found to obey an additional law VP2 = constant. The gas is initially at temperature T and volume V. What wiII be the temperature of the gas when it expands to a volume 2V?
PhysicsHeat
Physics
A polytropic process for an ideal gas is represented by equation PVn = constant. If g is ratio of specific heats 
, then value of n for which molar heat capacity of the process is negative, is given as :
A polytropic process for an ideal gas is represented by equation PVn = constant. If g is ratio of specific heats , then value of n for which molar heat capacity of the process is negative, is given as :
PhysicsHeat
Physics
If the ratio of specific heat of a gas at constant pressure to that at constant volume is , the change i n internal energy of the mass of gas , when the volume changes from V to 2V at constant pressure p , is
If the ratio of specific heat of a gas at constant pressure to that at constant volume is , the change i n internal energy of the mass of gas , when the volume changes from V to 2V at constant pressure p , is
PhysicsHeat
Physics
One mole of an idea l gas at a temperature T1K expands slowly according to the law 
Its final temperature is T2K . The work done by the gas is
One mole of an idea l gas at a temperature T1K expands slowly according to the law Its final temperature is T2K . The work done by the gas is
PhysicsHeat
Physics
Initial volume of three samples of same gas A,B and C are same. The process A is adiabatic, B is isobaric and C is isothermal. Each of the sample has same final pressure and volume. The initial pressure of which sample was maximum.
Initial volume of three samples of same gas A,B and C are same. The process A is adiabatic, B is isobaric and C is isothermal. Each of the sample has same final pressure and volume. The initial pressure of which sample was maximum.
PhysicsHeat
Physics
In an adiabatic process 
. The pressure of the gas Will be proportional to :
In an adiabatic process . The pressure of the gas Will be proportional to :
PhysicsHeat
Physics
p- V diagram of a diatomic gas is a straight line passing through origin . The molar heat capacity of the gas in the process wilI be :
p- V diagram of a diatomic gas is a straight line passing through origin . The molar heat capacity of the gas in the process wilI be :
PhysicsHeat
