Given the equation Ca + H2O --> Ca(OH)2 + H2 how many grams of calcium will react completely with 10.0 grams of water? *

11.0 g of calcium will react with 10.0 grams of water.

Explanation:

To calculate the moles, we use the equation:

moles of

The balanced chemical equation is:

According to stoichiometry :

2 moles of require = 1 mole of

Thus 0.55 moles of require=  of  

Mass of

Thus 11.0 g of calcium will react with 10.0 grams of water.

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.