Tensai Science Academy

The study of heat changes in chemical reactions is called what?

Absorbs heat from surroundings
Releases heat to surroundings
No heat transfer
Occurs only at low temperature

What is the SI unit of energy?

Exothermic reaction
Endothermic reaction
Isothermal reaction
Adiabatic process

The enthalpy change of a reaction is represented by which symbol?

Products are lower in energy than reactants
Products are higher in energy
No energy difference
Energy constantly increases

A reaction that releases heat is called what?

Kilojoule (kJ)
Mole (mol)
Gram (g)
Liter (L)

A reaction that absorbs heat is called what?

The heat content of a system at constant pressure is called what?

Specific heat capacity
Calorimeter constant
q = mc?T

What law states that the enthalpy change of a reaction is independent of the pathway?

What type of calorimeter is commonly used to measure enthalpy changes in solution?

Energy required to break bonds
Energy released forming bonds
Sum of atomic masses
Activation energy only

The enthalpy of formation is defined for forming 1 mole of a compound from what?

Bond formation releases energy
Bond formation absorbs energy
Bond formation has no energy change
Bond formation decreases entropy

What is the enthalpy change when 1 mole of substance burns completely in oxygen?

Activation energy
Free energy
Entropy
Bond polarity

Which process always has a positive enthalpy change: melting, freezing, combustion, or condensation?

Catalyst lowers activation energy
Catalyst increases ?H
Catalyst raises temperature
Catalyst consumes reactants

In an endothermic reaction, the products have what compared to reactants?

Exothermic process releases heat
Exothermic process absorbs heat
Exothermic process is reversible only
Exothermic process reduces entropy

Bond breaking is generally what type of process?

Endothermic
Exothermic
Isothermal
Adiabatic

Bond formation is generally what type of process?

Exothermic
Endothermic
Isobaric
Isochoric

The energy needed to initiate a chemical reaction is called what?

Negative
Positive
Zero
Cannot be measured

Which reaction releases energy: exergonic or endergonic?

Enthalpy change
Entropy change
Work done
Internal energy

The enthalpy of neutralization involves what type of reaction?

?H does not depend on path
?H depends on catalyst
?H depends on pressure only
?H cannot be measured

What is the heat change when 1 mole of solute dissolves in solvent called?

Calorimeter
Thermometer
Manometer
Spectrometer

A bomb calorimeter is typically used for measuring the enthalpy of what process?

Standard enthalpy change
Entropy change
Activation energy
Bond dissociation energy

What term describes the heat energy associated with chemical reactions at constant pressure?

?H < 0
?H > 0
?H = 0
Depends on reaction type

Tensai Science Quiz