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WorksheetsThermodynamics
Total questions: 16
Worksheet time: 8mins
---------------is an intensive property
area
entropy
temperature
volume
------ is an extensive property.
specific heat capacity
heat capacity
molar volume
density
Isolated system can exchange------- with its surroundings.
only energy
both matter and energy
neither matter nor energy
only matter
Work and heat are ------function.
state
path
If heat flows into the system from the surrounding, then heat is taken as ------
positive
negative
If work is done by the system, the internal energy of the system decreases, then work done by the system is taken as--------
negative
positive
The enthalpy of formation of O2 in its standard state is ------
+0.1 kJ mol-1
0
-0.1 kJ mol-1
+16 KJ mol-1
C (diamond) → C ( graphite),
Δ H = -ve, this indicates that
graphite has more energy than diamond
graphite is thermodynamically more stable than diamond
thermodynamic stability cannot be predicted
Both graphite and diamond are energetically equal
The potential energy diagram of a reaction is shown. Which statement below is correct relating to this reaction?
#1 represents the enthalpy change for this exothermic reaction.
#2 represents the enthalpy change for this endothermic reaction.
#3 represents the enthalpy change for this endothermic reaction.
#4 represents the enthalpy change for this exothermic reaction.
The diagram represents two solids and the temperature of each. What occurs when the two solids are placed in contact with each other?
Heat energy flows from solid A to solid B. Solid A decreases in temperature
Heat energy flows from solid A to solid B. Solid A increases in temperature
Heat energy flows from solid B to solid A. Solid B decreases in temperature.
Heat energy flows from solid B to solid A. Solid B increases in temperature.
Which law states that the change of enthalpy in a chemical reaction is the same regardless of whether the reaction takes place in one step or several steps, provided the initial and final states of the reactants and products are the same?
Third Law of Thermodynamics
Netwon's Law of Cooling
Hess's Law
Joule's Law of Heating
----------------------------------------- of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.
Heat of combustion
Heat of formation
Standard Heat of formation
Standard heat of reaction
First Law of Thermodynamics states that (keeping in mind the sign convention of IUPAC)
ΔU = Q + W
ΔU = Q - W
ΔU = W-Q
ΔU = -W -Q
Enthalpy (H) is defined by the relation
H = U + PV
H = U - PV
H = UV + P
H = PV - U
Heat change at constant volume is
U
ΔU
H
ΔH
Heat change at constant pressure is
U
ΔU
H
ΔH
