Thermochem and States Test REVIEW

If the heat for an equation is negative (ex. -25 kJ) then the equation is considered

• endothermic

• exothermic

• both

• neither

Heat is...

• temperature

• energy transferred between samples because they have different temperatures

• kinetic energy

• bond energy

An endothermic reaction absorbs heat from

• the surroundings

• the reaction

• the chemical bonds

• the atoms

What type of reaction does this graph represent?

• chemical

• nuclear

• endothermic

• exothermic

If the heat is on the right side of the arrow, the reaction is

• endothermic

• nuclear

• exothermic

• stable

This graph represents which type of reaction?

• exothermic

• endothermic

• nuclear

• quantum

How much heat is produced when 10.55 grams of CH₄ are burned in this reaction?

• 9400. kJ

• 891 kJ

• 0.1899 kJ

• 589.9 kJ

A reaction that absorbs heat from the surroundings is called

• endothermic

• exothermic

• enthalpy

• nuclear

Convert 65 calories to Joules. (1 cal = 4.18 J)

• 65 cal

• 272 cal

• 16 cal

• 23 cal

When the heat is shown on the left side of the arrow, the reaction is

• endothermic

• exothermic

• nuclear

• enthalpy