What is an enthalpy change?
Enthalpy change refers to the change in heat pressure given out or taken in by a system when the pressure is constant.
SR
Related Chemistry A Level answers
All answers ▸Calculate the percentage, by mass, of carbon in cyclohexane. Give your answer to two significant figures.
A naturally occurring sample of the element boron has a relative atomic mass of 10.8 In this sample, boron exists as two isotopes. Calculate the percentage abundance of 10B in this naturally occurring sample of boron.
State how you would test a solution for the presence of sulfate ions? Explain, using an ionic equation, what you would expect to observe in the presence of sulfate ions.
What happens upon the addition of NaOH solution (OH- ions) to a pink solution of cobalt chloride? Include equation(s) in your answer.