Thermo

A 15.75g piece of iron absorbs 1086J of heat energy, and the temperature changes from 25°C to 175°C. Calculate the specific heat capacity of iron.

• 2,565,675 J/gC
• 0.46 J/gC
• 0.39 J/gC
• 114 J/gC

An _________ reaction releases heat into its surroundings.

• endothermic
• exothermic
• action potential 
• enthalpy

Water freezing is an example of which type of reaction?

• endothermic
• exothermic
• enthalpy
• temperature change

How much energy is needed to raise the temperature of 10g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/g°C?

• 297 J
• 495 J
• 3.34 J
• 405 J

What mass of water will change its temperature by 3°C when 525 J of heat is added to it?  The specific heat of water is 4.18 J/g°C.

• 6,583.5g
• 41.9g
• .00265g
• 525g

The study of heat released or absorbed by chemical reactions is called

• thermodynamics
• thermochemistry
• enthalphy
• entropy

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

The S.I. unit for energy is

• calorie
• Kelvin
• grams
• joules

The part of the world that we study in a chemical reaction is called the 

• universe
• surroundings
• system
• ecosystem

Tags

NGSS.HS-PS1-6

According to the Law of Conservation of Energy, the energy in the universe is 

• ever changing
• constant
• flowing
• decreasing

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

Heat always flows from _____ to ________

• cold to hot
• hot to cold
• top to bottom
• bottom to top

Tags

NGSS.HS-PS3-4