TRIVIA Click for Question T/F: Energy is the capacity to do work. true Click for: Answer and next Question

TRIVIATRIVIA

Click for Question

T/F: Energy is the T/F: Energy is the capacity to do work.capacity to do work.

true

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True/False: Chemical True/False: Chemical Kinetic energy is stored Kinetic energy is stored

in the atoms of the in the atoms of the molecules.molecules.

false


True/False: The change True/False: The change in enthalpy of a system in enthalpy of a system during a reaction must during a reaction must be a constant pressure.be a constant pressure.

true


A ________________ A ________________ equation includes the equation includes the physical states of the physical states of the

reactants and products reactants and products and specifies the and specifies the

change in enthalpy.change in enthalpy.

thermochemical


The _______ is the The _______ is the amount of energy amount of energy

required to evaporate required to evaporate one mole of a liquid.one mole of a liquid.

Molar enthalpy of vaporization


Using ________ law, the Using ________ law, the enthalpy change for a enthalpy change for a

reaction can be calculated reaction can be calculated by adding two or more by adding two or more

thermochemical equations thermochemical equations and their enthalpy and their enthalpy

changes.changes.Hess’s


Standard enthalpies of Standard enthalpies of formation are based formation are based

upon assigning a upon assigning a standard enthalpy of standard enthalpy of

____ kJ to all elements in ____ kJ to all elements in their standard states.their standard states.

Zero (0)


True/False: Exothermic True/False: Exothermic reactions tend to be reactions tend to be

spontaneous.spontaneous.

true


_________is a measure of _________is a measure of disorder or randomness disorder or randomness

of a system. of a system.

Entropy


_____energy is the _____energy is the energy AVAILABLE to do energy AVAILABLE to do

work.work.

Gibb’s Free


If the reaction’s free If the reaction’s free energy is negative the energy is negative the

reaction is said to be…..reaction is said to be…..

spontaneous


The heat of reaction for The heat of reaction for exothermic reactions is exothermic reactions is

…..…..

negative


The formula for finding q The formula for finding q is…is…

Q=cmT


The formula for The formula for calculating Gibbs free calculating Gibbs free

energy is?energy is?

Gsys = Hsys - TS


When calculating Gibbs When calculating Gibbs free energy, the free energy, the

temperature must be temperature must be in….in….

Kelvin


How does one covert How does one covert from Celsius to Kelvin?from Celsius to Kelvin?

Add 273 to the C temperature


When calculating the When calculating the Heat of reaction what is Heat of reaction what is

the equation?the equation?

Hproducts - Hreactants


In an endothermic In an endothermic reaction, which has reaction, which has more energy, the more energy, the

products or reactants?products or reactants?

products


Which of the following Which of the following has the greatest has the greatest

entropy: NHentropy: NH33 (g) and (g) and NHNH33 (l) (l)

NH3(g)


Which of the following Which of the following has the greatest has the greatest

entropy? COentropy? CO22(s) and (s) and COCO22(g)(g)

CO2 (g)


What does dissolving a What does dissolving a gas in an aqueous gas in an aqueous

solution do for entropy?solution do for entropy?

Increases entropy


When the number of When the number of gaseous products gaseous products

increases in a chemical increases in a chemical reaction, the entropy….reaction, the entropy….

increases


What letter is used to What letter is used to represent heat?represent heat?

Q


What letter is used to What letter is used to represent specific heat?represent specific heat?

c


What is the letter that What is the letter that represents free energy represents free energy

of a system? of a system?

G


What letter is used to What letter is used to represent entropy?represent entropy?

S


When solving q=cmT When solving q=cmT problems, what other problems, what other letter would designate letter would designate

what units the what units the temperature need to be temperature need to be

in?in?

C (if the unit is J/gC, then the temperature

needs to be in CClick for: Answer and next Question

If Mg(s) + HCl(aq)If Mg(s) + HCl(aq) HH22(g) + MgCl(g) + MgCl22(aq) (aq)

releases energy, how releases energy, how would the test tube feel would the test tube feel

on your hands?on your hands?

warm


Because freezing is an Because freezing is an exothermic process, the exothermic process, the

energy is __________.energy is __________.

released


For the following For the following reaction, calculate the reaction, calculate the

Hrxn.Hrxn.2NaHCO2NaHCO33(s) (s) Na Na22COCO33(s) (s)

+ CO+ CO22(g) + H(g) + H22O(g)O(g)

[-1130.70+-393.595 + -241.818]-(2x+950.8)=-3424.077 kJ


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TRIVIA Click for Question T/F: Energy is the capacity to do work. true Click for: Answer and next Question