quiz 6

Question 1

is enthalpy intensive or extensive

Answer 1

intensive

Question 2

what kind of energy is enthalpy?

Answer 2

chemical potential

Question 3

what does delta H mean

Answer 3

change in enthalpy

Question 4

deltaH formula

Answer 4

deltaU + PdeltaV = deltaH

or deltaH = qp

Question 5

what are the units of delta H

Answer 5

usually in units of per mole

Question 6

deltaHrxn formula

Answer 6

= qrxn/nrxn
n is number of moles
qrxn is J

Question 7

how do you find how much heat is released from grams of a compound?

Answer 7

balance the equation, convert grams to moles by dividing by molar mass
take the moles and multiply by deltaHrxn
answer in Joules

Question 8

what happens to deltaHrxn if you have to multiply the equation by a number

Answer 8

it also multiplies the deltaHrxn total by whatever you did to the equation

Question 9

what happens to deltaHrxn when you flip the equation

Answer 9

it flips the sign of deltaHrxn

Question 10

what does deltaHnaught mean

Answer 10

standard enthalpy change

Question 11

reactants and products in their standard state have an standard enthalpy change of ___

Answer 11

0