Liquid nitrogen trichloride is heated in a 1.25−L closed reaction vessel until it decomposes completely to gaseous elements. The resulting mixture exerts a pressure of 773 mmHg at 86°C. What is the partial pressure of each gas in the container?

N2= 193.25mmHg

Cl2= 579.75mmHg

Explanation:

Total number of moles=4

For N2 mole fraction=1/4

Partial pressure of N2= 1/4× 773= 193.25mmHg

For Cl2, mole fraction= 3/4

Partial pressure of Cl2= 3/4 × 773 = 579.75 mmHg

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.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a