5.0 grams of vinegar and 5.0 grams of baking soda are combined in a beaker. After the fizzing (reaction) has taken place, there are 9 grams of
material remaining in the beaker. What mass of carbon dioxide gas was
produced in the reaction and released to the air? *
10 grams
9 grams
6 grams
1 gram

the answer would be a

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.