7. How many days does it take for 16 g palladium-103 to decay to 1.0g? The half-life of palladium-103 us 17 days.
11:14 am
do) A B ENG 15/09/2000
E

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.