Chemistry (Chapter 12)- Energy changes in chemical reactions

Helpfulness: 0
Set Details Share
created 5 years ago by MegaKenneth99
show moreless
Page to share:
Embed this setcancel
code changes based on your size selection


-Absorbs heat
-Positive enthalpy change
-Bonds are broken



-Releases heat
-Negative enthalpy change
-Bonds are made


When are endothermic reaction used in everyday objects

Cold packs for sports injuries.
Ammonium nitrate dissolves, energy is absorbed making the surroundings cooler


When are exothermic reaction used in everyday objects

-Hand warmers, self heating cans
-Calcium oxide is added to water, releasing heat energy


When food and fuels react with oxygen...

What is released in what type of reaction?
What unit of measurement is used?
What piece of equipment can we use?

-Energy, exothermic


Draw and describe an endothermic energy level diagram

card image

-Energy is absorbed by the reaction, temp drops.
-Products have higher energy levels (thus +entalaphy change)


Draw and describe an exothermic energy level diagram

card image

-Energy is released, temp rises
-Products have lower energy levels (thus -entalaphy change)


What affects does a catalyst have on the structure of the graph

-The height of graph will be lower if catalyst is present
-Due to lower activation energy


In chemical reactions, energy must be supplied to _____________ between atoms in the reactants

break the bonds


When new bonds are formed....

energy is released


In an exothermic reaction, the energy released when new bonds formed is_________ than when bonds are broken



In an endothermic reaction, the energy released when new bonds formed is_________ than when bonds are broken


Related pages

mesenchymal cells are most commonly found in connective tissuecomponent of lymphatic systemagonistic musclespictures of normal tonsils in adultskeeps cell membrane from collapsingsn is the chemical symbol forwhats exocytosisglomerular processmineralocorticoid is to aldosterone as glucocorticoid is tosympathetic branch of the autonomic nervous systemnaming compounds and acidssynarthrotic jointswhat is the phenotypic ratio of the offspringoutermost meninx covering the braintkam quizstatins moathe primary purpose of the trial balance is tofeatures of eukaryotesplankton correctabsorptive nutrition definitionphylum anthocerophytafreeing a kidney from adhesionspituitary pinealthe fetal skeletonwhere is the popliteal fossa locatedwhy are the walls of arteries thicker than veinstransverse section of the spinal cordmerchants of death apushfertilization in the mosses is dependent uponlimy bilewhere is the terminal filum foundwhich of the following statements about plant hormones is truecomponents of the conduction system of the heartbones of the appendicular skeletonfunctions of the pharynxtranscription process animationfrench numbers 0-30what substance makes up the bulk of a toothhow to draw dna replicationdifference between true pelvis and false pelvisdna to trna converterprocess of filtration in kidneybraille bugsudden epigastric paintransitional epithelial tissuealtruistisessential amino acids mnemonicglencoe answersbicuspid atrioventricular valverain in the tundradefine hypervitaminosistemperate grassland average precipitationconflict habituated marriagemultiplying or dividing vectors by scalars results inwhere in the human male does spermatogenesis occurcamera shots and angles quizhow are chytrids different from other fungibranches of the thoracic aortasuperficial region of kidney tissuepediatric failure to thrive nursing care planeasy notecards campbell biologyoutermost layer of heartkeystone of the cranial floorthe term meaning any disease of the thymus gland ismrna codon chartroot hairs are important to a plant because theyforms mucous serous and epidermal membraneslipoprotein that transports cholesterolpertaining to hearing crosswordwhat are nadh and fadh2