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WorksheetsChemistry - Enthalpy
Total questions: 14
Worksheet time: 6mins
Name
Class
Date
1.
The SI unit of heat and energy is the __________.
a)
calorie
b)
heat
c)
joule
d)
watt
2.
ΔH value in an endothermic reaction is a positive number.
a)
True
b)
False
3.
What type of reaction is shown in the reaction pathway?
a)
endothermic reaction
b)
exothermic reaction
4.
How do you calculate Enthalpy of a reaction?
a)
ΔH = ΔHproducts - ΔHreactants
b)
ΔT = q / mC
c)
ΔG = ΔH -TΔS
d)
E = mc2
5.
Which statement is true regarding endothermic reactions?
a)
a) Temperature change is positive and enthalpy change is positive
b)
b) Temperature change is positive and enthalpy change is negative
c)
c) Temperature change is negative and enthalpy change is positive
d)
d) Temperature change is negative and enthalpy change is negative
6.
Endothermic reactions feel
a)
warm
b)
cold
7.
Define 'Enthalpy'
a)
a) Energy stored in the movement of molecules in a substance
b)
b) The opposite of temperature
c)
c) The temperature of a molecule
d)
d) Energy stored in the chemical bonds in a substance
8.
A reaction that gives out energy to the surroundings causes the surroundings ....
a)
temperature to drop
b)
temperature to rise
c)
temperature to remain constant
d)
temperature to vary
9.
The enthalpy change is a negative (-) value, what side of the equation will the energy value be on.
a)
Reactants
b)
Products
10.
In the reaction picture, the energy will be on product or reactant
a)
Product
b)
Reactant
11.
_?_ is the amount of energy required to raise the temperature of 1 gram of any substance 1oC.
a)
Specific heat
b)
A calorie
c)
Thermal energy
d)
Conduction
12.
What type of reaction is shown in the reaction pathway?
a)
endothermic reaction
b)
exothermic reaction
13.
In the Image, will the heat (+177.8 KJ) be a product or a reactant?
a)
Product
b)
Reactant
14.
In the Image, will the heat (-890.4 KJ KJ) be a product or a reactant?
a)
Product
b)
Reactant
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