As the kinetic energy of the molecules in a substance increases, the temperature ...?
What is increases?
100
The amount of energy required to raise the temperature of 1 gram of a substance by 1 degree Celsius
What is specific heat?
100
energy (heat)=(mass)(specific heat)(x)? What is x?
What is change in temperature
100
Exothermic
What is a reaction that gives off heat energy?
100
Two conditions that favor a spontaneous reaction
What is an increase in entropy and a decrease in enthalpy?
200
A block of copper (specific heat=.385) requries 625,000 J of thermal energy to change in temperature from 27C to 139C. WHAT IS THE MASS OF THE COPPER BLOCK?
What is 14,494 g
200
A device used to measure the energy as heat absorbed or released in a chemical or physical change.
What is a calorimeter?
200
The SI unit for heat.
What is the Joule?
200
This quantity can be used to compare heat absorption capacities for different materials
What is specific heat?
200
This is expected to happen if an object reaches absolute zero.
What is the movement would cease?
300
Calculate the specific heat for indium metal, given that 1.0 mole of indium absorbs 53 J while increasing in temperature from 297.5 K to 299.5 K.
What is 0.23 J/gK?
300
Absolute zero
What is where all movement ceases (0 K)
300
If a cup of coffee is 80 degrees Celsius and an ice cube is added, how does heat flow?
What is from the coffee into the ice cube?
300
Transfer of energy through waves.
What is radiation?
300
When 1 mole of a liquid freezes, entropy __?__
What is decreases?
400
What is the specific heat of substance that requries 99,100 J of thermal energy to heat 3470 g of this substance from 11C to 45C
What is .839 J/gC?
400
Heat
What is a form of energy that is transferred by a difference in temperature
400
If the mass of an object is doubled the specific heat will ..?
What is remain unchanged?
400
The amount of energy absorbed by a system as heat during a process at constant pressure.
What is enthalpy change?
400
The total enthalpy change for a reaction equals ..?
What is sum of [heat of formations of products x mol of products] - [ sum of heat of formations of reactants x mol of reactants]
500
Convert 305 K to the Celsius scale
What is 32C?
500
The overall enthalpy change in a reaction is equal to the sum of enthalpy changes for the individual steps in the process.
What is Hess's Law?
500
When an object is heated it tends to ____________.
What is expand?
500
The enthalpy change that occurs when one mole of a compound is formed from its elements in there standard state at 25 degrees celsius and 1 atm.
What is molar enthalpy of formation?
500
How does the enthalpy of the products of a reaction system compare with the enthalpy of the reactants when the reaction is endothermic?
What is the energy of the products is greater than the energy of the reactants.