Question

PLEASE HELP ME!!
Which of the following indicates that an endothermic reaction has taken place?
Choose one answer.
a.
cooling of the surroundings

b.
release of heat and light energy

c.
a loud explosion

d.
a change in color

Answer 1

Which of the following indicates that an endothermic reaction has taken place?
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A. cooling of the surroundings

Answer 2

Thank you, can you answer more?

Answer 3

I will try...

Answer 4

thank you!!! The generalized equation A + B → AB represents a __________ reaction.
Choose one answer.
a.
decomposition

b.
double displacement

c.
single displacement

d.
synthesis

Answer 5

The generalized equation A + B → AB represents a __________ reaction.

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Synthesis reaction

Answer 6

A carbon to carbon bond has a bond enthalpy value of 348 kJ. Which of the following must happen to form a carbon to carbon bond?
Choose one answer.
a.
348 kJ of energy is absorbed from the surroundings

b.
348 kJ of energy is released to the surroundings

c.
348 kJ of energy is taken from the reactants to form the products

d.
348 kJ of energy must be supplied from an external heat source