Miscellaneous
How many significant figures in 0.006?
What are 3?
Which neutral atom has 19 electrons?
What is potassium (K)?
When you increase the temperature of matter, you also increase the ____________________.
Kinetic energy
A 50.0 g piece of aluminum (c=0.897 J/g°C) is heated from 20.0°C to 60.0°C. How much heat is absorbed?
What is 1,794J?
A balloon has a volume of 3.0 L at 300 K. What will its volume be if the temperature is increased to 450 K, assuming pressure is constant?
What is 4.5 L?
In a heating curve, what is happening on the flat regions of the graph?
The matter is changing states.
If an atom has a mass of 127 amu and 53 protons, how many neutrons does it have?
74 neutrons
Why does the temperature of ice remain constant at 0°C while it is melting, even though heat is being added?
Although energy is still entering the ice, the energy is being used to change the phase instead of increase the temperature.
A 200.0 g sample of water (c=4.184 J/g°C) cools from 80.0°C to 25.0°C. How much heat is released?
What is -45,024J?
A gas is stored in a sealed container at a pressure of 2.5 atm and a temperature of 300 K. If the temperature is increased to 450 K, what will the final pressure be, assuming volume remains constant?
What is 3.75 atm?
In a heating curve, what is happening on the diagonal parts of the graph?
The matter is changing temperature.
How many electrons can fit in the third energy level of an atom?
8
During distillation, we are separating a mixture. This means we are breaking what type of bonds?
What are Intermolecular bonds?
A calorimeter absorbs 200.0 J of heat, causing its temperature to rise from 20.0°C to 30.0°C. what is its mass if c=0.900 J/g°C?
What is 22.2 g?
A gas sample occupies 2.5 L at a pressure of 1.2 atm. If the pressure increases to 2.4 atm, what will the new volume of the gas be, assuming temperature remains constant?
What is 1.25 L?
When a system is absorbing energy it feels cold, this is called...
Endothermic
Why do the noble gases not react with other elements?
They have a full valence shell.
If two metals have specific heats of 0.243 for metal A and 0.989 for metal B, which metal will heat up more quickly when the same amount of heat is applied?
What is metal A?
A 50.0 g piece of hot iron (c=0.450 J/g°C) at 150.0°C is placed into 100.0 g of water at 25.0°C. If no heat is lost to the surroundings, what is the final temperature of the system?
What is 34.3°C?
A mixture of gases contains 20% oxygen, 30% nitrogen, and 50% carbon dioxide. If the total pressure of the mixture is 6.0 atm, what is the partial pressure of nitrogen?
What is 1.8 atm?
The equation for heat of fusion is used to calculate the heat during which phase change?
Melting
Which atom is in group 17 period 3?
What is Cl (chlorine)?
Why do atoms in a group have the same properties and reactivity?
They have the same number of valence electrons.
A 150.0 g piece of copper (c=0.385 J/g°C) absorbs 2,310 J of heat. If its initial temperature was 25.0°C, what is its final temperature?
What is 65.0°C?
A 5.0 L sample of gas is at 2.0 atm and 250 K. If the gas is compressed to 3.0 L and the temperature increases to 300 K, what is the final pressure?
What is 4.0 atm?