CHEM 103 LAB 2 CHEMICAL REACTION
CERTIFICATION EVALUATION 2026 TESTED
QUESTIONS AND ANSWERS
◉ 1.00 atm equals ....... Answer: 1 torr
◉ 14.7 psi. Answer: 1.00 atm equals ....
◉ Boyle's Law. Answer: if the temperature of a gas is CONSTANT, the
pressure exerted by the gas varies inversely as the volume
P1V1=P2V2
pressure goes up and volume goes down
pressure goes down volume goes up
◉ Avogadro's Law. Answer: equal volumes of gases at the same
temperature and pressure contain the same number of molecules
◉ Charles' Law. Answer: the volume of a quantity of gas, held at a
FIXED pressure varies directly with the Kelvin temperature
,V1/T1=V2/T2
Temp. increases volume increases
Temp decreases volume decreases
◉ Combined Gas Law. Answer: Boyle's and Charles' combined
P1V1/T1 = P2V2/T2
◉ Ideal Gas Law. Answer: PV = nRT
Pressure = atm
Temp. = K
Volume = Liters
n = moles
R = .0821 (Universial Gas constant)
◉ Dalton's Law (Partial Pressures). Answer: P total = P1 +P2 +P3 +
......
◉ total pressure. Answer: the sum of the partial pressure of the
individual gases
,◉ partial pressure. Answer: the pressure it would exert if it were the
only gas in the container
◉ change of state. Answer: a substance change from one form to
another
TEMP IS ALWAYS CONSTANT
◉ sublimination. Answer: a substance changes directly to a gas from
a solid
◉ endothermic. Answer: heat energy is abosorbed
◉ exothermic. Answer: heat energy is given off
◉ evaporation. Answer: molecules escape from the liquid state to
the gas state
◉ rate of evaporation. Answer: increases with temperature
◉ vapor. Answer: a gas that exists at a temperature and pressure at
which it would ordinarily be thought of as liquid or solid
, ◉ volatile substance. Answer: substance that readily evaporates at
room temperature because of high vapor pressure
◉ boiling point. Answer: the temperature at which the vapor
pressure of a liquid becomes equal to the atmospheric pressure
exerted on the liquid
◉ intermolecular force. Answer: an attractive force that acts
between a molecule and another molecule
◉ dipole-dipole. Answer: between two polar moleculespositive end
of one attracts the negative end of another
◉ london dispersion. Answer: weak temporary intermolecular
forces that occur between polar and non polar molecules
◉ hydrogen bond. Answer: strong dipole dipole interaction between
a hydrogen atom covalently bonding to a small, very electronegative
atom, F O N and a lone pair on another small electronegative atom
◉ surface tension. Answer: directly related intermolecular attraction
between its molecules
greater H bonding, greater surface tension
CERTIFICATION EVALUATION 2026 TESTED
QUESTIONS AND ANSWERS
◉ 1.00 atm equals ....... Answer: 1 torr
◉ 14.7 psi. Answer: 1.00 atm equals ....
◉ Boyle's Law. Answer: if the temperature of a gas is CONSTANT, the
pressure exerted by the gas varies inversely as the volume
P1V1=P2V2
pressure goes up and volume goes down
pressure goes down volume goes up
◉ Avogadro's Law. Answer: equal volumes of gases at the same
temperature and pressure contain the same number of molecules
◉ Charles' Law. Answer: the volume of a quantity of gas, held at a
FIXED pressure varies directly with the Kelvin temperature
,V1/T1=V2/T2
Temp. increases volume increases
Temp decreases volume decreases
◉ Combined Gas Law. Answer: Boyle's and Charles' combined
P1V1/T1 = P2V2/T2
◉ Ideal Gas Law. Answer: PV = nRT
Pressure = atm
Temp. = K
Volume = Liters
n = moles
R = .0821 (Universial Gas constant)
◉ Dalton's Law (Partial Pressures). Answer: P total = P1 +P2 +P3 +
......
◉ total pressure. Answer: the sum of the partial pressure of the
individual gases
,◉ partial pressure. Answer: the pressure it would exert if it were the
only gas in the container
◉ change of state. Answer: a substance change from one form to
another
TEMP IS ALWAYS CONSTANT
◉ sublimination. Answer: a substance changes directly to a gas from
a solid
◉ endothermic. Answer: heat energy is abosorbed
◉ exothermic. Answer: heat energy is given off
◉ evaporation. Answer: molecules escape from the liquid state to
the gas state
◉ rate of evaporation. Answer: increases with temperature
◉ vapor. Answer: a gas that exists at a temperature and pressure at
which it would ordinarily be thought of as liquid or solid
, ◉ volatile substance. Answer: substance that readily evaporates at
room temperature because of high vapor pressure
◉ boiling point. Answer: the temperature at which the vapor
pressure of a liquid becomes equal to the atmospheric pressure
exerted on the liquid
◉ intermolecular force. Answer: an attractive force that acts
between a molecule and another molecule
◉ dipole-dipole. Answer: between two polar moleculespositive end
of one attracts the negative end of another
◉ london dispersion. Answer: weak temporary intermolecular
forces that occur between polar and non polar molecules
◉ hydrogen bond. Answer: strong dipole dipole interaction between
a hydrogen atom covalently bonding to a small, very electronegative
atom, F O N and a lone pair on another small electronegative atom
◉ surface tension. Answer: directly related intermolecular attraction
between its molecules
greater H bonding, greater surface tension
