Physical & Chemical Properties
A property of a substance that can be observed or measured without changing the substance.
An intensive property of a substance that reflects the ratio of its mass to its volume, it can be used to identify a substance and is often confused with lightness or heaviness.
What is density?
Another name for a homogeneous mixture.
What is a solution?
In physics, we might be more concerned with energy as the ability to do work, but in chemistry we might more often think of energy as the transfer of this.
What is heat?
A useful potential identifier of a substance, it is the c in q = mcΔt.
What is specific heat?
A physical state in which the particles are relatively close together but still able to flow.
What is liquid?
The density (in g/mL) of a substance that occupies 4 mL of space and has a mass of 3.0 g.
What is 0.8 g/mL?
Of the "leaves" on our tree of matter, the only one that is not uniform throughout.
What is a heterogeneous mixture?
A law that states that energy is neither created nor destroyed--it is only transformed from one form to another.
What is the Law of Conservation of Energy?
The number of joules in a calorie.
What is 4.184?
A change in composition.
What is a chemical change?
The volume (in mL) of a sample of mercury (density = 13.6 g/mL) with a mass of 5.0 g.
What is 0.37 mL?
The mass (in kg) of calcium in a 52.0 kg sample of calcium carbonate that is 40% by mass calcium.
What is 20 kg?
The term given to a chemical or physical change that requires heat.
What is endothermic?
The heat (in J) required to raise the temperature of a 25.0 g sample of copper (c = 0.385 /g°C) by 2.5°C.
What is 24 J?
In the reaction of A and B to produce C and D, the mass (in g) of D produced if 1.0 g of C is also produced when 3.0 g of A and 9.0 g of B react completely.
What is 11.0 g?
The mass (in kg) of 1.5 L of gold (density = 19.3 g/mL).
What is 29 kg?
The mass of a sample of manganese steel that contains 35 g of iron, given that the steel is 27.2% by mass iron.
The form of energy released when atoms are split.
What is nuclear energy?
The new temperature of a 75.0 g sample of a substance with a specific heat of 0.450 J/g°C at 95.0°C that releases 1.50 kJ of heat.
What is 50.6°C? (ΔT = -44.4°C)
The changes in state in which a gas goes directly to a solid and from a solid directly to a gas, respectively.
What are deposition and sublimation?
The volume of a 25.0 g sample of an alloy of copper (density = 8.94 g/mL) and zinc (density = 7.14 g/mL) that is 60.% by mass copper and 40.% zinc. (Assume that volumes are additive.)
What is 3.1 mL?
The mass of antimony required to mix with 50.0 g of tin to produce a sample of pewter, rounded to the hundredths, given that you have the copper you need. (Modern pewter by mass is 91.0% Sn, 7.5% Sb, and 1.5% Cu.)
What is 4.12 g Sb?
The form of energy stored in the bonds of the foods we consume.
What is chemical energy? (or chemical potential energy)
The initial temperature of 225 mL of water (density = 1.000 g/mL) in a 500-mL beaker after a solid gold (c = 0.129 J/g°C) ring with a mass of 35.0 g heated to 351°C is dropped into it and the system settles at 95°C. (Presume that 100% of the heat lost by the ring is gained by the water, and round your answer to the tenths.)
What is 93.8°C?