Hydrogen free carbon in the form of coke is burned with complete combustion using 50% excess air. identify the species that will be found in the flue gas.

If complete combustion has occurred, then the only product of combustion would be carbon dioxide only. So, the flue gas would contain carbon dioxide (CO2), oxygen from the excess air supplied (O2) and all of the nitrogen that was supplied (N2). While the ash and other solid residues are found in the cinder.

Sugar and water are chemically combined.(a solution is chemically combined while a mixture is mixed together without bonding the molecules)

Answer : option c) heat is released during the process.explanation :

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.