Part A Calculate the standard enthalpy change for the reaction 2A +B= 2C + 2D where the heats of formation are given in the following table: AH? |(kJ/mol ) Substance A -257 B -405 225 -491 Express your answer in kilojoules. , View Available Hint(s) AHn = 387 kJ Submit Previous Answers Correct • Part B For the reaction given in Part A, how much heat is absorbed when 3.80 mol of A reacts? Express your answer numerically in kilojoules. , View Available Hint(s) kJ Submit , Part C For the reaction given in Part A, ASn is 35.0 J/K . What is the standard Gibbs free energy of the reaction, AGxn ? Express your answer numerically in kilojoules. , View Available Hint(s) AG{xn kJ

Explain why some “Green Energies” are not so green by giving an example.short answer please

4. If sugar is melted to the liquid state and then allowed to condense back into a solid has anything happened to change the sugar molecules? Explain your answer. (2-3 sentences)

Solve correctly please, with explanation need.

If this piece of blue litmus paper is placed in that acid solution,then this piece of blue litmus paper will turn red.which of the following is true of this conditional statement: A. The antecedent is "this piece of blue litmus paper will turn red." B. This statement is false. C. This statement cannot serve as a premise in an argument. D. This statement cannot be the conclusion of an argument.