Theory 1
Heat is never created, lost or destroyed - it is simply transferred.
What is the first Law of Thermodynamics?
Heat is this type of energy.
What is kinetic?
A substance which freezes at -219'C
What is oxygen?
One side of the equation must have this when mixing hot and cold.
What is a negative sign?
1000 calories
What is a kilocalorie (Cal)?
The amount of energy required to raise the temperature of a kg of substance by 1' Celcius
What is specific heat capacity?
The definition of heat
What is the movement of energy from one place to another?
The specific heat of steam.
What is 2.09 J/g'C?
This instrument is used to calculate food energy.
What is a calorimeter?
The enthalpy of the overall reaction equals the sum of the enthalpy of each of the steps.
What is Hess' Law?
The three things that determine how much heat is transferred.
What are mass, specific heat capacity and temperature change?
These are the result of water freezing and thawing.
What are potholes? (or split rocks)
The boiling point of chloroform.
What is 62'C?
The type of reaction that allows us to use freezer packs that don't need to be stored in the freezer.
What is endothermic?
These three component parts of any food are used to calculate food energy.
What are fat (9Cal/g), protein and carbohydrates (each 4Cal/g)?
These conversions do not result in a temperature change.
What are phase changes?
The forces of repulsion and attraction that exist between molecules of all substances
What are intermolecular forces?
The number of steps involved when ice at 0' C changes to superheated steam.
What is 4?
The change in heat is written on the product side in this type of reaction.
What are exothermic reactions?
The signs of the enthalpy from the table depend on this.
What is the heat of formation vs the heat of decomposition? (What is whether the substance is a reactant or a product?)
This is how you find the change in temperature.
What is Tf - Ti ?
The particles move the slowest in this state of matter.
What is a solid?
Given two substances of different specific heat, the one that is most resistant to temperature change has this feature.
What is higher specific heat?
The measure of the transfer of heat energy.
What is temperature?
The total amount of energy contained within a system.
What is enthalpy?