Extra Thermochemistry Review

What is the vocab term for the quantity of heat needed to raise the temperature of 1g of pure water by 1°C?

• Joule

• Specific Heat

• Heat Capacity

• calorie

What is the vocab term for the quantity of heat needed to raise the temperature of 1g of a substance by 1°C?

• Joule

• Specific Heat

• Heat Capacity

• calorie

What is the standard unit for heat?

• Calorie

• calorie

• Joule

How does energy flow?

• It goes from hot to cold

• It goes from cold to hot

• It transfers without any particular means

• It doesn't flow

Tags

NGSS.HS-PS3-4

How does energy change in a reaction?

• It changes mass

• It increases

• It decreases

• It transfers

Tags

NGSS.HS-PS1-4

Does the total energy change in a reaction?

• NEVER

• Yes, it increases

• Yes, it decreases

• Yes, but some increases and some decreases

Tags

NGSS.HS-PS1-4

How much ammonia (NH₃) can be melted by the addition of 2 kJ of heat (ΔH_fus = 5.66 kJ/mol)

• .66 g

• 3.6 g

• 79.2 g

• 6.0 g

Tags

NGSS.HS-PS1-4

If you enthalpy is negative, what type of process it is and where would the heat go in the chemical equation?

• endothermic, reactant

• endothermic, product

• exothermic, reactant

• exothermic, product

Tags

NGSS.HS-PS1-4

How do calories and joules differ from one another?

• they are two different measurements of energy

• calories measure energy and joules measure heat flow

• joules are used in chemsitry and calories are used in biology

• joule and calorie are two different names for the same unit of energy

How many calories of heat are required to raise the temperature of 225g of Al from 20°C to 100°C? (specific heat of Al = 0.21 cal/g°C)

• 590 calories

• 3800 calories

• 38000 calories

• 85000 calories

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4