Thermo Quiz: High School

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Thermo basics quiz

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edwin villhauer

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Thermo Quiz: High School


Froggy Jumps Thermo Quiz: High SchoolVersión en línea Thermo basics quiz por edwin villhauer 1 What is enthalpy change (ΔH) a measure of in a chemical process? a Temperature change of the surroundings only b Energy used to break bonds only c Heat absorbed or released at constant pressure 2 An exothermic reaction a absorbs heat from the surroundings b releases heat to the surroundings c has no heat transfer 3 In calorimetry, the calorimeter measures a the total mass of reactants b the heat exchange between system and surroundings c air temperature 4 Which process is endothermic? a Condensation of steam b Combustion of wood c Ice melting at room temperature 5 Specific heat capacity is defined as the amount of heat needed to a convert 1 mole to gas b raise the temperature of 1 g of substance by 1°C c change the phase of 1 g by 1° 6 Standard enthalpy of formation refers to formation of a compound from a its elements in their standard states b its ions in solution c its atoms from gas phase 7 Which instrument is used to measure heat changes in a chemical reaction? a Thermometer b Barometer c Calorimeter 8 In Hess's law, the enthalpy change for a reaction is a the sum of enthalpy changes of steps b the product of enthalpies c independent of pathways 9 Bond dissociation energy affects overall ΔH mainly because a breaking bonds requires energy b temperature determines ΔH c forming bonds releases energy only 10 If 100 g of water is heated from 20°C to 60°C (c=4.18 J/g°C), how much heat is added? a W = 100 g × 4.18 J/g°C × 40°C = 16720 J b W = 40 g × 4.18 J/g°C × 60°C c W = 100 g × 1 J/g°C × 40°C

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Thermo Quiz: High School

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Thermo Quiz: High SchoolVersión en línea

por edwin villhauer

What is enthalpy change (ΔH) a measure of in a chemical process?

An exothermic reaction

In calorimetry, the calorimeter measures

Which process is endothermic?

Specific heat capacity is defined as the amount of heat needed to

Standard enthalpy of formation refers to formation of a compound from

Which instrument is used to measure heat changes in a chemical reaction?

In Hess's law, the enthalpy change for a reaction is

Bond dissociation energy affects overall ΔH mainly because

If 100 g of water is heated from 20°C to 60°C (c=4.18 J/g°C), how much heat is added?