Chemical Reactions and Enthalpy Quiz

What does the symbol ΔT represent in the formula ΔH = mcΔT? a) Time b) Temperature change c) Total energy d) Mass change

• Time

• Temperature change

• Total energy

• Mass change

What is the main factor contributing to the temperature change in a chemical reaction? a) Mass b) Volume c) Pressure d) Energy change

• Mass

• Volume

• Pressure

• Energy change

A chemical reaction that occurs in a hand warmer, releasing heat into the surroundings, is: a) Endothermic b) Exothermic c) Isobaric d) Adiabatic

• Endothermic

• Exothermic

• Isobaric

• Adiabatic

Enthalpy is best described as: a) Internal energy of a system b) Total energy of a system c) Energy transferred as heat at constant pressure d) Energy transferred as work at constant volume

• Internal energy of a system

• Total energy of a system

• Energy transferred as heat at constant pressure

• Energy transferred as work at constant volume

When a chemical reaction occurs in a cold pack and absorbs heat from its surroundings, it is termed: a) Exothermic b) Endothermic c) Isobaric d) Isothermal

• Exothermic

• Endothermic

• Isobaric

• Isothermal

If Ava heats a 100 g sample and experiences a temperature change of 20°C, and the specific heat capacity is 3 J/g°C, what is the heat change (ΔH)? a) 600 J b) 3 J c) 2,000 J d) 60 J

• 600 J

• 3 J

• 2,000 J

• 60 J