Ch 6 - Thermochemistry Flashcards
1
Q
endothermic
A
positive ΔH, heat in
2
Q
exothermic
A
negative ΔH, heat out
3
Q
specific heat capacity (c)
of water?
A
quantity of heat required to change the temperature of 1g of an object by 1K
4.184 J/g*K
4
Q
qlost +qgain = 0 can be turned into
A
qrxn + qH2O + qcal = 0
5
Q
ΔH definition and equation
A
change in enthalpy
related to coefficients, proportional to amount of substance
ΔHrxn = qrxn/mol of product
6
Q
ccal
A
container gains/loses heat
qcal = ccal * ΔT
7
Q
q=
A
q=cmassΔT
8
Q
heat of formation (ΔHf)
A
1 mol of a compound forms from its elements in their most stable form
usually exothermic (-)
9
Q
ΔHrxn = (coefficients)
A
ΔHrxn = ΣcoeffΔHfproducts - ΣcoeffHfreactants
10
Q
ΔHcomb
A
how much energy you can get per 1 mole of fuel reactant
11
Q
ΔHfus
A
endothermic, melting, solid to liquid
12
Q
ΔHvap
A
endothermic, liquid to gas
