Physics questions
20129 published questions with worked solutions.
- A system is provided with 200 cal of heat and the work done by the system on the surroundings is 40 J. then , its internal energy
- 1 g of water of volume 1 cm^3 at 100° C is converted into steam at same temperature under normal atmospheric pressure (= 1 10^5...
- A sample of 0.1 g of water at 100^0C and normal pressure (1.013 10^5 N m^ -2 ) requires 54 cal of heat energy to convert to steam...
- In a certain process, 400 cal of heat is supplied to a system and at the same 105 J of mechanical work was done on the system....
- 1 cm^3 of water at its boiling point absorbs 540 cal of heat to become steam with a volume = 1671 cm^3 and the mechanical...
- A cylinder of fixed capacity (of 44.8 L) contains 2 moles of helium gas at STP. What is the amount of heat needed to raise the...
- 5 moles of an ideal gas with = 7/5, initially at STP is compressed adiabatically, so that its temperature becomes 400^0C. The...
- If an average person jogs, he produces 14.5 10^4 cal/min. This is removed by the evaporation of sweat. The amount of sweat...
- For an isothermal expansion or compression, (where W_1 and W_2 are the net work for expansion and compression, respectively)
- 10 moles of an ideal gas at constant temperature 500 K is compressed from 50 L to 5 L. Work done in the process is (Take, R =...
- If work is done on the system in an adiabatic process,
- The temperature of an ideal gas increases to 2 times when compressed adiabatically to half the volume. Its equation of state can...
- Amongst the following relations which is true in the case of an adiabatic process, where = C_p/C_V ?
- 1 mole of an ideal monoatomic gas is heated at a constant pressure of 1 atmosphere from 0^ to 100^ . Work done by the gas is
- Six moles of O_2 gas is heated from 20^ to 35^ at constant volume. If specific heat capacity at constant pressure is 8 cal mol^...
- A monoatomic ideal gas, initially at temperature T_1 is enclosed in a cylinder fitted with a frictionless piston. The gas is...
- The specific heat of hydrogen gas at constant pressure is C_p = 3.4 10^3 cal/kg^ and at constant volume is C_V = 2.4 10^3 cal/kg^...
- A mass of dry air at NTP is compressed to 1 20 th of its original volume suddenly. If = 1.4, the final pressure would be
- A gas expands with temperature according to the relation V = kT^ 2/3 . Calculate work done when the temperature changes by 60 K.
- A given mass of a gas is compressed isothermally until its pressure is doubled. It is then allowed to expand adiabatically until...