University:
California State University, Northridge
Course:
CHEM 101 | General Chemistry I
Academic year:

2024
Views:

315

Pages:

8
Author:

Samuel K

Chapter 8: Energy and ThermodynamicsDue Apr 10 at 11:59pmPoints 15Questions 15Available Apr 4 at 12am - Apr 10 at 11:59pmTime Limit NoneThis quiz is no longer available as the course has been concluded.Question 11 ptsHow does the concept of enthalpy (H) relate to the heat absorbed orreleased in a chemical reaction?Enthalpy represents the total internal energy of a system.Enthalpy is the measure of disorder or randomness in a system.The change in enthalpy (AH) represents the heat absorbed orreleased in a reaction.Enthalpy has no relation to heat in a chemical reaction. Question 21 ptsWhat is the difference between potential energy and kinetic energy?Potential energy is associated with motion, while kinetic energyis stored energy.Potential energy is stored energy, while kinetic energy isassociated with motion.Potential and kinetic energy are the same thing.Potential energy is related to temperature, while kinetic energyis related to pressure.Question 31 ptsWhat is the law of conservation of energy?Energy can be created but not destroyed.Energy cannot be created or destroyed; it can only change forms.Energy can be converted from kinetic to potential energy.Energy can only exist in the form of heat. Question 41 ptsWhat is the standard unit of energy in the International System ofUnits (SI)?WattCalorieJouleNewtonQuestion 51 ptsWhat is the definition of heat in thermodynamics?The total internal energy of a systemThe movement of particles in a substanceThe transfer of energy due to a temperature differenceThe ability of a substance to do work Question 61 ptsWhat is the relationship between temperature and kinetic energy ofparticles in a substance?As temperature increases, kinetic energy decreases.As temperature decreases, kinetic energy decreases.Temperature and kinetic energy are not related.As temperature increases, kinetic energy increases.Question 71 ptsWhat is the specific heat capacity of a substance?The heat required to raise the temperature of one gram of thesubstance by one degree CelsiusThe temperature at which a substance changes from a solid to aliquidThe energy released during a chemical reactionThe ability of a substance to conduct heat Question 81 ptsWhat is the formula for calculating heat (q) in a system?(q = mc)(AT)(q =mc^2)AT)(q = mc/T)Question 91 ptsHow does the sign of (AH) (change in enthalpy) indicate whether areaction is exothermic or endothermic?Positive (AH) indicates exothermic, and negative (AH) indicatesendothermic.Positive (AH) indicates endothermic, and negative (AH) indicatesexothermic.(AH) does not provide information about the nature of thereaction.Both positive and negative (AH) indicate exothermic reactions. Question 101 ptsWhat is the first law of thermodynamics?Energy cannot be created or destroyed; it can only change forms.Energy can be created but not destroyed.Heat always flows from a hot object to a cold object.The total internal energy of a system remains constant.Question 111 ptsWhat is the definition of entropy (S) in thermodynamics?The measure of disorder or randomness in a systemThe total internal energy of a systemThe ability of a substance to conduct heatThe energy released during a chemical reaction Question 121 ptsWhat is the second law of thermodynamics?Energy cannot be created or destroyed; it can only change forms.The total internal energy of a system remains constant.Heat always flows from a hot object to a cold object.The entropy of an isolated system always increases.Question 131 ptsHow does the concept of Gibbs free energy (G) relate to spontaneityof a chemical reaction?If (AG) is positive, the reaction is spontaneous.If (AG) is negative, the reaction is spontaneous.(AG) has no relation to spontaneity.If (AG) is zero, the reaction is spontaneous. Question 141 ptsWhat is the equation for calculating Gibbs free energy (AG)?(AG=AH-TAS) -(AG = AH + TAS)(AG = AH/T + AS)(AG = AH - AS/T)Question 151 ptsWhat does a negative (AG) indicate about a reaction?The reaction is spontaneous.The reaction is non-spontaneous.The reaction is at equilibrium.(AG) cannot be negative.