Chemistry CH 10: Causes of Change

Enthalpy is the

• heat of formation at constant pressure
• heat of combustion at constant pressure
• energy of a system at constant pressure

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The greek letter Δ stands for

• heat stored in
• mass of
• rate of
• change in

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Which of the following is a measure of the average KE of the particles in a sample of matter? 

• chemical kinetics
• thermochemistry
• reaction rate
• temperature

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How is celsius temperature converted to Kelvins? 

• add 273
• subtracting 273
• divide by 273
• multiply by 273

In the expression q=ncΔT, what do q and n represent? 

• heat and the number of particles
• heat and moles of particles
• heat capacity and moles of particles
• enthalpy and moles of partilces

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The greater the KE of the particles in a sample of matter, 

• the higher the temperature
• the lower the temperature
• the more heat a sample will absorb

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The study of all energy changes is called

• thermodynamics
• enthalpy
• entropy
• temperature

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What is the standard thermodynamic temperature? 

• 25K
• 25⁰C
• -24.2J/mol
• -484J/K*mol

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In a calorimeter, the energy content of a substance is calculated from measurement of the temperature change in a known mass of

• iron
• air
• water
• steel

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For an exothermic reaction, the products 

• are at the same energy level as the reactants
• have no energy
• are at a lower energy level than the reactants
• are at a higher energy level than the reactants

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