Worksheets6.5 Heating Curve and Gibbs Free Energy Quiz
Total questions: 11
Worksheet time: 7mins
On the heating curve shown, where is melting occuring?
P
Q
R
S
T
On the heating curve, what is that state of matter at S?
a solid melting
a liquid boiling
a gas
a gas condensing
The curve shown to the right is called a ....
hot/cool curve
heating curve
cooling curve
Moving left to right on the heating curve shown, is energy being absorbed or released?
absorbed
released
Which of the following would be the symbol associated with an exothermic reaction?
+ΔH
-ΔH
+ΔS
-ΔS
Which equation would be used when moving right to left from letters C to B on this heating curve?
q = mcsolidΔT
q = (moles)(ΔHofusion)
q = -(moles)(ΔHofusion)
q = mcgasΔT
A reaction that reaches equilibrium or goes to completion on its own is said to be …….
non-favorable
nonspontaneous
endothermic
thermodynamically favorable
Which of the following symbols is used to indicate a spontaneous reaction?
+ΔS
+ΔH
-ΔG
-ΔT
Which of the choices best describes the thermodynamic favorability of this reaction?
AB(s) → A(g) + B(g) ΔHo = -10 kJ/mol
always thermodynamically favorable
never thermodynamically favorable
Which of the following is the unit of measurement for change in enthalpy (ΔH)?
moles/Liter
degrees celsius
Kelvin
kJ/mol
When following Hess' Law to determine the enthalpy, which equation below would be flipped?
3 C(s) + 4 H2(g) → C3H8(g) ΔH kJ = -103.8 kJ
C(s) + O2(g) → CO2(g) ΔH kJ = -393.5 kJ
H2(g) + 1/2 O2(g) → H2O(g) ΔH kJ = -241.8 kJ
C3H8(g) + 5O2(g)→ 3CO2(g) + 4H2O(g)
3 C(s) + 4 H2(g) → C3H8(g)
C(s) + O2(g) → CO2(g)
H2(g) + 1/2 O2(g) → H2O(g)
C3H8(g) + 5O2(g)→ 3CO2(g) + 4H2O(g)
