Enthalpy

ΔH value in an endothermic reaction is a positive number.

• True
• False

Tags

NGSS.HS-PS1-4

The SI unit of heat and energy is the __________.

• calorie
• heat
• joule
• watt

Define the term Exothermic by picking the correct statements

• Products have less energy than the reactants

• ΔH is negative

• ΔH is positive

• Energy is given out to the surroundings (temperature goes up).

• products have more energy than the reactants

Tags

NGSS.HS-PS1-4

Define Endothermic by picking the correct statements

• ΔH is positive

• Energy is taken in from the surroundings (temperature goes down).

• Energy is given out to the surroundings (temperature goes up).

• · Products have less energy than the reactants

• products have more energy than the reactants

Tags

NGSS.HS-PS1-4

If 100 g of aluminum at 145ºC gains 6,800 J of heat, what is the final temperature (T_final) of the aluminum? Aluminum has a specific heat of 0.897 J/gºC. (Q=mcΔT)

• -69°C
• 0.52°C
• 221°C

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-4