Matter & Energy
Endo/Exo
Calculating Heat
Miscellaneous
100
Which state(s) of matter (solid, liquid, or gas) apply to the following description:
Definite Volume
Liquid and Solid
100
A chemical reaction takes place in a beaker filled with water. The beaker and the water heat up. Is the reaction endothermic or exothermic?
exothermic
100
What is the temperature of an object, in degrees Celsius, that is 220 Kelvin?
-53°C
100
Label the types of heat transfer shown in the diagram below: CONVECTION, RADIATION, CONDUCTION
A) Convection
B) Conduction
C) Radiation
200
Which of the substances below would be classified as elements and NOT compounds:
Ca, CO2, C6H12O6, B, H2, NH3
Ca, B, and H2
200
Which state of matter (solid, liquid, or gas) has the least kinetic energy, and which one has the most?
Least = Solid
Most = Gas
200
How many calories is 2,500 joules? (1 cal = 4.18 J)
598.09 cal
200
What type of heat transfer travels through space and not matter?
radiation
300
In what type of system will the amount of matter and energy change?
Open System
300
Endothermic or exothermic:
A) ___ A system absorbs heat from its surrounding.
B) ___ Surrounding heats up.
C) ___ A reaction taking place in a beaker feels cold
A) Endo
B) Exo
C) Endo
300
The heat of vaporization for water is 2,260 J/g. How much energy is needed to boil 50 grams of water?
113,000 J
300
Match the terms to the descriptions below:
Thermal Energy, Temperature, Heat
A) The kinetic energy that transfers between objects that are different temperatures
B) The total combined kinetic energies of all the particles in a substance
C) The average kinetic energy of the particles in a substance
A) Heat
B) Thermal Energy
C) Temperature
400
5 grams of ice was placed in a container. The next day, the ice was melted, but still contained 5 grams of water. What type of system is the container?
Closed System
400
What is the name of the phase change where a solid turns into a gas? Is it endothermic or exothermic?
sublimation; endothermic
400
The specific heat of iron is 0.45 J/g°C. How much energy is needed to raise the temperature of 200 grams of iron by 80°C?
7,200 J
400
A substance has to be in which state(s) of matter for heat to transfer by convection?
Liquid or Gas
500
What is the difference between a chemical change and a physical change?
A new substance is being made in a chemical change, but not in a physical change.
500
What are THREE phase changes that are EXOTHERMIC?
freezing, condensing, deposition
500
A substance has a heat of fusion of 150 J/g. How many grams of the substance can be melted with 5,000 J?
33.33 g
500
Match the letters to the descriptions below:
1) Melting/Freezing = ___
2) Vaporizing/Condensing = ___
3) Gas = ___
4) Solid = ___
1) B
2) D
3) E
4) A
600
Is the energy in coal and oil kinetic or potential? What type specifically?
potential energy (chemical)
600
Which letter in the energy diagram represents:
A) Change in Enthalpy (H) = ___
B) Activation Energy = ___
A) Change in Enthalpy (H) = C
B) Activation Energy = B
600
A 75 gram rock is given 450 J of heat. The tmperature of the rock increases from 28.2°C to 45.5°C. What is the specific heat of the rock?
0.35 J/g°C
600
A) What is the melting point (in °C) of the substance?
B) What is the boiling point (in °C) of the substance?
C) What state of matter is the substance in at 50°C?
A) 60°C
B) 120°C
C) Solid
700
Name FOUR types of KINETIC energy.
mechanical, thermal/heat, electrical, light, and sound
700
Identify the following energy amounts (in KJ):
A) Change in Enthalpy (H) = ___KJ
B) Activation Energy = ___KJ
C) Is the reaction endothermic or exothermic?
A) Change in Enthalpy (H) = -200 KJ
B) Activation Energy = 100 kJ
C) EXOTHERMIC
700
The specific heat of aluminum is 0.22 J/g°C. A 42 gram silver ring at 40°C is given 330 J of energy. Calculate the change in temperature of the ring AND its final temperature.
Change in Temp = 35.7°C
Final Temp = 75.7°C
700
Glass Y contains 50 grams of water at 25°C. Glass Z contains 50 grams of water at 75°C.
A) Which glass contains water with more thermal energy?
B) Which glass contains water with a higher average kinetic energy?
A) Glass Z
B) Glass Z
800
6 CO2 + 6 H2O --> C6H12O6 + 6 O2
How many atoms of OXYGEN are on the product side of the chemical equation shown above?
18
800
Select the correct terms in the description below:
Liquid water molecules in the glass have [more | less] kinetic energy than the water molecules in the ice. Energy from the [liquid water | ice] molecules is transferred to the [liquid water | ice]. This caused the water molecules in the ice to [gain | lose] kinetic energy and become a liquid. Ice melting is an [endothermic | exothermic] process.
more; liquid water; ice; gain; endothermic
800
A cup of oil at 120°C is added to 75.0 grams of water. The water temperature changes from 25°C to 37°C. The specific heat of the oil is 1.65 J/g°C and the specific heat of water is 4.18 J/g°C. What mass of oil was added to the water?
27.47 grams
800
Two blocks are made of iron. Block X is 100 grams and Block Y is 500 grams. Both blocks are heated to 150°C.
A) Which block has a greater average kinetic energy?
B) Which block has more thermal energy?
C) Will heat transfer between the two blocks when they come into contact?
A) Both the same
B) Bock Y
C) No