Endothermic/Exothermic
Heat is absorbed by the system.
What is endothermic?
This law states that during any process, energy is neither created nor destroyed.
What is the Law of Conservation of Energy?
The unit represented by the symbol J.
What is joules?
Heat is neither lost or destroyed.
What is the law of conservation of energy?
If aluminum is heated from 30oC to 50oC, what is the change in temperature?
20oC
When "q" is negative.
What is an exothermic reaction?
This is what "q" stands for.
What is heat energy?
Represented by m in the heat equation.
What is mass?
The amount of energy needed to raise 1g of a substance by 1oC.
What is specific heat capacity?
What is the equation for heat energy?
q = mCDT
2H2 + O2 --> 2H2O +571KJ
What is an exothermic reaction?
This is how you find DT (delta T).
What is final temperature - initial temperature?
The unit of measurement for temperature.
What is Celsius or Kelvin?
The tendency for substances to expand when the temperature is increased.
What is thermal expansion?
A sample of iron was heated from 0.00oC to 30.0oC. It absorbed 35.2J of energy as heat. If the specific heat of iron is 0.440J/goC, what is the mass of the iron?
2.67g
Photosynthesis is an example of this.
What is an endothermic reaction?
In the equation q = mCDT, C stands for this.
What is specific heat?
The unit for specific heat.
What is J/goC or cal/goC?
Energy that transfers from one object to another because of a difference in temperature.
What is heat?
How much energy does a 4.00g copper sample absorb as energy in the form of heat if its specific heat is 0.384J/goC after it is heated to 40.0oC from 10.0oC?
46.1J
The reaction starts with more energy than it ends with.
What is exothermic?
The energy that transfers from one object to another due to a temperature difference.
What is heat?
The conversion factor for cal to J.
What is 1 cal = 4.184 J?
The average kinetic energy of substance's particles.
What is temperature?
40.0g of 97.8oC gold was added to 20.0ml of 24.2oC water. After 2 minutes, the temperature of the water stabilized at 28.5oC. What is the specific heat capacity of the metal?
0.130J/goC