Question

Which process is endothermic but involves only a physical change?
A)frying an egg
B)boiling a liquid
C)burning wood
D)freezing water

Answer 1

Do you know the definition for an endothermic reaction?

Answer 2

I think its the absorption of heat.

Answer 3

great...so which of the above requires you to add heat?

Answer 4

is it a

Answer 5

Excellent!

Answer 6

OKay thanks

Answer 7

hang on ...it says it involves a physical change only

Answer 8

What about b ...do you have to add energy to boil a liquid?

Answer 9

When you fry an egg is there a chemical change?
If so, a cant be correct.

Answer 10

B definable \[water \rightarrow boiling water \]\[boiling water \rightarrow water \] reversable...