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How many calories in 1 Calorie?
1000
How many J in one calorie?
4.184
What happens to heat in endothermic reactions?
Heat is absorbed
What happens to heat in exothermic reactions?
Heat is released.
What is heat?
The energy transferred between objects with different temperatures?
What is energy?
The ability to do work.
What is kinetic energy?
The energy of motion (temperature).
What is the law of conservation of energy?
States that is neither created or destroyed.
What does IMF mean?
Inter-molecule forces
What does "m" mean in the specific heat equation?
Mass
What does the "c" equal in the specific heat equation?
Specific heat
Is cooking an egg an exothermic or endothermic reaction?
Endothermic
What happens to the speed of molecules when the temperature raises?
The speed raises.
What is heat of solidification?
The amount of heat released by 1 mol of a substance as it changes from liquid to solid.
What is enthalpy?
The total energy of a system at a given temperature and pressure.
What is heat of fusion?
The amount of heat absorbed by 1 mol of a substance as it changes from solid to liquid.
What is specific heat?
The energy that is needed to transform 1 g of a substance by 1 C
What is the equation for specific heat?
Q = mc (delta T)
There are 200 Calories in pizza. How many joules are in there?
What is a caloriemeter?
A piece of equipment designed to measure energy released or absorbed during a chemical reaction or phase change.
How much heat is needed to melt 200 g of butter at 0 C? (heat of fusion = 130)
26000
There are 150 Calories in AJ's burrito. How many joules are there?
150000
How much heat is needed to melt 120 g of cheese at 0 C? (Heat of fusion = 125 C)
15000
How much heat is needed to vaporize 175 g of water? (Heat of vaporization = 162)
28350
60 g of liquid water is at 0 C. How many kJ must be removed to turn water into a solid at 0 C?
20.055
It takes 400 J of heat to heat 25 g of copper from 25 to 75 C. What is the specific heat in joules/g x C
.32 j/g x c
How much heat (in calories) is needed to raise 45.0g of water from 20 C to 30 C?
1882.8 J
A 300 gram sample of ethanol is heated from 20°C to 75°C. The specific heat capacity of ethanol is 2.44 J/g°C. How much heat energy is required?
40260
A 400 g sample of gold is heated up 40 C. If the specific heat is 1.23, how much heat is absorbed?
19680
A 450 g sample of copper is heated up 45 C. If the specific heat is 1.30, how much heat is absorbed?
26325