Changes in a system from an initial state to the final state were made by a different manner that Î”H remains same but q change..
In order to decompose 9 g water 142.5 kJ heat is required. Hence, the enthalpy of formation of water is
Three moles of an ideal gas expanded spontaneously into vacuum. The work done will be
How many joules of heat are absorbed when 70.0 g of water is completely vaporised at its boiling point ?
The heat of combustion of carbon to CO2 is - 393.5 kJ/mol. The heat released upon formation of 35.2 g of CO2 from carbon and oxyge..
the vapour pressure of acetone at 20 degree C is 185 torr. when 1.2 g of a non - volatile
A gas undergoes a thermodynamical process but the volume of the gas does not change. What is the nature of this process ?
Which of the following units represent the largest amount of energy
Which of the following is true for an adiabatic process
Mark the correct statement
Which of the following are not state functions
Energy equivalent to one erg, one joule and one calorie is in the order
For the cyclic process
Which of the following is not a state function
One calorie is equal to
The cooling in refrigerator is due to
If a refrigerators door is opened,then we get
Conditions of standard state used in Thermochemistry is
Point out the wrong statement in relation to enthalpy
Calculate the amount of heat evolved when 500 cm^3 of 0.1 M HCl is mixed with 200 cm^3 of 0.2 M NaOH.
A reaction occurs spontaneously if
Internal energy does not enclude
The temperature of the system decrease in an
The bond energy (in kcal mol^-1) of C-C single bond is approximately
Among them intensive property is
In thermodynamics which one of the following is not an intensive property
Which of the following is the correct option for free expansion of an ideal gas under adiabatic condition
a pistol filled with 0.04 mol of an ideal gas expands
It is general principle that the less energy a system contains, it is
The process, in which no heat entres or leaves the syatem, is termed as
in a fuel call, methanol is used as fuel and oxygen gas is used
The relation between H and U is
For an isolated system,
Î”U = 0, then
In an adiabatic process
If one mole of ammonia and one mole of hydrogen chloride are mixed in a closed container to form ammonium chloride gas, then
the standard enthalpy of formation of NH 3 is - 46.60 kj mol^-1.
Which of the following is an intensive property ?
Hesss law is based on
In an isothermal process
The temperature of the system decreases in an
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