Bring the HEAT
The amount of energy it takes to heat one gram of water by one degree Celsius.
What is a calorie?
How many joules are needed to warm 25.5 grams of water from 14 degrees C to 22.5 degrees C? (C of water = 4.184 degrees C).
907 joules
During a reaction, the reactant that runs out first.
What is the limiting reagent?
What is the equation to determine the amount of heat released from a substance?
H = mCT
A reaction where heat energy is absorbed.
What is an endothermic reaction?
The SI unit for energy.
What are joules?
The specific heat of gold is 0.128 J/gC. How much heat would be needed to warm 250.0 grams of gold from 25.0C to 100.0C?
2,400 joules
During a reaction, the reactant that does not run out.
What is excess reactant?
What method is used to calculate the amount of energy that was created or released during a chemical reaction?
Dimensional analysis
A reaction where heat energy is released.
What is an exothermic reaction?
The amount of energy it takes to raise one gram of a substance by one degree?
What is specific heat?
How much heat is released when 147 grams of NO2 is dissolved in excess water? (molar mass of NO2 = 46g)
3NO2 + H2O --> 2HNO3 + NO; Enthalpy = -138 KJ
-441 KJ
The calculated amount of product expected to be made after the reaction.
What is the theoretical yield?
A series of reactions are added together to find the enthalpy change of a similar reaction.
What is Hess's Law?
The enthalpy value is negative.
What is an exothermic reaction?
4.184 J/gC
What is the specific heat of water?
What would be the final temperature of 3,310 joules were added to 18.5 grams of water at 22.0 C? (specific heat of water = 4.184 J/gC)
64.8 degrees C
The amount of product made after performing the reaction.
What is the actual yield?
What equation would I use to find the specific heat of a substance?
C = H/mT
The enthalpy value is positive.
What is an endothermic reaction.
Burning a candle is an example of a _________ reaction.
What is exothermic?
CuCl2 + 2NaNO3 --> Cu(NO3)2 + 2NaCl
If 15 grams of CuCl2 (molar mass = 134 g/mol) react with 20 grams of NaNO3 (molar mass = 85 g/mol), what is the limiting reagent?
CuCl2
Number used to describe the ratio to how much product was produced and how much was expected to be produced.
What is percent yield?
What equation would be used to find the change in temperature of substance if the mass, specific heat, and heat energy are known?
T = H/mC
The name of the energy that must be overcome for a reaction to occur.
What is activation energy?