What is the name given to currents in fluids created by the ruse and fall of materials wgen they are heated and cooled?

Adozen is 1221/12 = 1.751.75 x 12 = 21therefore, 1.75 is the answer.

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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.