Thermo+ Flashcards
Pieces of Metal “A” and Metal “B” of equal mass are placed in the sun. Metal “A” gets hotter faster. Why?
Metal “A” had a lower specific heat
1 mole of oxygen gas at STP will fill a ____ balloon
22.4 L
In a sealed metal container, PRESSURE IS INCREASED. What will happen to the temperature ?
Increase
If you wanted to make hot water pipes out of one of these metals and not have energy lost to the pipe. Assuming equal masses, which would be best?
A. Zinc (0.39)
B. Iron (0.45)
C. Aluminum (0.89)
D. Lead (0.13)
C
What is the molar mass of CaCl2?
111 g/mol
What is the melting point of water at standard pressure?
0^C
When 10g of reactant A perfectly reacts with 15g of reactant B, how much product will be made?
Exactly 25 g
How many moles are in 100g of sulfur?(approximately)
3 moles
In the process of freezing water, HEAT energy …
Is released
If a cup of hot water is mixed with a cup of cold water, which best describes the flow of energy?
A. Hot LOST energy, cold LOST energy
B. Hot LOST energy, cold GAINED energy
C. Hot GAINED energy, cold GAINED energy
D. Hot GAINED energy, cold LOST energy
B
If a balloon of air was filled with 20 L at 22^C at standard pressure, what would its temperature have to be adjusted to if the volume needed to be 15 L at 150 kpa ?
327.6 K
What is the pressure on a balloon that is filled to 10L with 5 moles of He at 50^C? (R=8.31 kpa L/ mol K)
1342.065 kpa
How much energy is needed to heat 200g of water from 5^C to 90^C ?
71,060 J
A bar of aluminum is at room temperature (23^C) and weighs 100g. What temperature does a bar of aluminum go to, if 2000 joules of energy was removed?
0.53^C
A piece of metal weighing 200g at 90^C was placed into 100g of water which started at 20^C. The energy from the metal went into the water changing the temperature of both to 35^C, what is the specific heat of the metal?
0.57 j/g^C
