A necessary condition for an adiabatic change is-
1. ∆T = 0
2. ∆P = 0
3. q = 0
4. w = 0
The enthalpy of formation of all elements in their standard state is-
3. Less than zero
4. Different for each element
for combustion of methane is -x kJ mol-1.
The value of for the same reaction would be -
701 J of heat is absorbed by a system and 394 J of work is done by the system.
The change in internal energy for the process is-
The reaction of cyanamide, with dioxygen, was carried out in a bomb calorimeter, and ∆U was found to be at 298 K.
The enthalpy change for the reaction at 298 K would be -
The amount of heat needed to raise the temperature of 60.0 g of aluminum from 35°C to 55°C would be -
(Molar heat capacity of Al is )
The enthalpy of formation of are
–110 kJ , – 393 kJ , 81 kJ and 9.7 kJ respectively.
The value of for the reaction would be-
The standard enthalpy of formation of gas in the above reaction would be-
The standard enthalpy of formation of from the following data is -
The enthalpy change for the reaction
would be -