Chemical decompositionChemical decomposition, or chemical breakdown, is the process or effect of simplifying a single chemical entity (normal molecule, reaction intermediate, etc.) into two or more fragments. Chemical decomposition is usually regarded and defined as the exact opposite of chemical synthesis. In short, the chemical reaction in which two or more products are formed from a single reactant is called a decomposition reaction.
DeathDeath is the end of an organism's life. It is the irreversible cessation of biological functions that sustain a living organism. Death is inevitable for all living things, as nature's tendency to disorder will cause all living systems to degrade and fail through various causes. The identification of the moment of death presents certain difficulties. A person may experience clinical death that is reversible, resulting in some cases in a near-death experience.
Carbon dioxideNames IUPAC nameCarbon dioxideOther names Carbonic acid gasCarbonic anhydrideCarbonic dioxideCarbonic oxideCarbon(IV) oxideMethanedioneR-744 (refrigerant)R744 (refrigerant alternative spelling)Dry ice (solid phase)Identifiers CAS Number124-38-93D model (JSmol)Interactive imageInteractive imageBeilstein Reference1900390 ChEBICHEBI:16526ChEMBLChEMBL1231871ChemSpider274ECHA InfoCard100.004.271EC Number204-696-9E numberE290 (preservatives)Gmelin Reference989 KEGGD00004MeSHCarbon+dioxidePubChemCID280RTECS numberFF6400000UNII142M471B3JUN number1013 (gas), 1845 (solid) CompTox Dashboard(EPA)DTXSID4027028InChIInChI=1S/CO2/c2-1-3Key: CURLTUGMZLYLDI-UHFFFAOYSA-NInChI=1/CO2/c2-1-3Key: CURLTUGMZLYLDI-UHFFFAOYAOSMILESO=C=OC(=O)=OProperties Chemical formulaCO2Molar mass44.009 g·mol Appearance Colorless gas OdorLow concentrations: noneHigh concentrations: sharp; acidicDensity1562kg/m (solid at 1 atm (100 kPa) and −78.5 °C (−109.3 °F))1101kg/m (liquid at saturation −37 °C (−35 °F))1.977kg/m (gas at 1 atm (100 kPa) and 0 °C (32 °F))Critical point (T, P) 304.128(15) K (30.978(15) °C), 7.3773(30) MPa (72.808(30) atm) Sublimationconditions194.6855(30) K (−78.4645(30) °C) at 1 atm (0.101325 MPa) Solubility in water1.45g/L at 25 °C (77 °F), 100 kPa (0.99 atm) Vapor pressure5.7292(30) MPa, 56.54(30) atm (20 °C (293.15 K)) Acidity (pKa) Carbonic acid:pKa1 = 3.6pKa1(apparent) = 6.35pKa2 = 10.33 Magnetic susceptibility (χ)−20.5·10cm/mol Thermal conductivity0.01662W·m·K (300 K (27 °C; 80 °F)) Refractive index (nD)1.00045 Viscosity14.90 μPa·s at 25 °C (298 K)70μPa·s at −78.5 °C (194.7 K)Dipole moment0D Structure Crystal structureTrigonal Point groupD∞hMolecular shapeLinearThermochemistry Heat capacity(C)37.135J/(K·mol) Std molarentropy(S298)214J·mol·K Std enthalpy offormation(ΔfH298)−393.5kJ·mol Pharmacology ATC codeV03AN02 (WHO) Hazards GHS labelling: PictogramsSignal wordWarningHazard statementsH280, H281Precautionary statementsP282, P336+P317, P403, P410+P403NFPA 704 (fire diamond) 200SALethal dose or concentration (LD, LC): LCLo (lowest published)90,000ppm (162,000mg/m) (human, 5min) NIOSH (US health exposure limits): PEL (Permissible)TWA 5000ppm (9000mg/m) REL (Recommended)TWA 5000ppm (9000mg/m), ST 30,000ppm (54,000mg/m) IDLH (Immediate danger)40,000ppm (72,000mg/m) Safety data sheet (SDS) Sigma-AldrichRelated compounds Other anionsCarbon disulfideCarbon diselenideOther cationsSilicon dioxideGermanium dioxideTin dioxideLead dioxideTitanium dioxideZirconium dioxideHafnium dioxideCerium dioxideThorium dioxideRelated carbonoxidesSee OxocarbonRelated compoundsCarbonic acidCarbonyl sulfideCarbonyl selenideSupplementary data page Carbon dioxide (data page)Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Nverify ( ?)
Nutrient cycleSet of processes exchanging nutrients between parts of a systemComposting within agricultural systems capitalizes upon the natural services of nutrient recycling in ecosystems. Bacteria, fungi, insects, earthworms, bugs, and other creatures dig and digest the compost into fertile soil.
OrganismAn organism is any living thing that functions as an individual. Such a definition raises more problems than it solves, not least because the concept of an individual is also difficult. Several criteria, few of which are widely accepted, have been proposed to define what constitutes an organism. Among the most common is that an organism has autonomous reproduction, growth, and metabolism. This would exclude viruses, even though they evolve like organisms.
MicroorganismA microorganism, or microbe, is an organism of microscopic size, which may exist in its single-celled form or as a colony of cells. The possible existence of unseen microbial life was suspected from antiquity, with an early attestation in Jain literature authored in 6th-century BC India. The scientific study of microorganisms began with their observation under the microscope in the 1670s by Anton van Leeuwenhoek.
DormancyDormancy is a period in an organism's life cycle when growth, development, and (in animals) physical activity are temporarily stopped. This minimizes metabolic activity and therefore helps an organism to conserve energy. Dormancy tends to be closely associated with environmental conditions. Organisms can synchronize entry to a dormant phase with their environment through predictive or consequential means.
WaterNames Preferred IUPAC nameWaterSystematic IUPAC nameOxidane (not in common use)Other names Hydrogen oxideHydrogen hydroxide (H2O or HOH)Hydroxylic acidDihydrogen monoxide (DHMO) (parody name)Dihydrogen oxideHydric acidHydrohydroxic acidHydroxic acidHydroxoic acidHydrolμ-Oxidodihydrogenκ-Hydroxylhydrogen(0)AquaNeutral liquidOxygen dihydride (may be considered incorrect)Identifiers CAS Number7732-18-53D model (JSmol)Interactive imageBeilstein Reference3587155 ChEBICHEBI:15377ChEMBLChEMBL1098659ChemSpider937DrugBankDB09145ECHA InfoCard100.028.902EC Number231-791-2Gmelin Reference117 KEGGC00001PubChemCID962RTECS numberZC0110000UNII059QF0KO0RCompTox Dashboard(EPA)DTXSID6026296InChIInChI=1S/H2O/h1H2Key: XLYOFNOQVPJJNP-UHFFFAOYSA-NSMILESOProperties Chemical formulaH2OMolar mass18.015 g·mol Appearance Almost colorless or white crystalline solid, almost colorless liquid, with a hint of blue, colorless gas OdorOdorless DensityLiquid (1 atm, VSMOW):0.99984283(84) g/mL at 0 °C0.99997495(84) g/mL at 3.983035(670) °C (temperature of maximum density, often 4 °C)0.99704702(83) g/mL at 25 °C0.96188791(96) g/mL at 95 °CSolid:0.9167 g/mL at 0 °CMelting point0.00 °C (32.00 °F; 273.15 K) Boiling point99.98 °C (211.96 °F; 373.13 K) SolubilityPoorly soluble in haloalkanes, aliphatic and aromatic hydrocarbons, ethers.
BiodegradationBiodegradation is the breakdown of organic matter by microorganisms, such as bacteria and fungi. In contrast to biodegradation, phytodegradation, which has few applications, relies on green plants to effect the degradation. In practice, almost all chemical compounds and materials are subject to biodegradation, the limiting element being time. Vegetables may degrade within days, whereas some plastics can take a lot of time to degrade.
BiosphereThe biosphere (from Ancient Greek (bíos)'life' and (sphaîra)'sphere'), also called the ecosphere (from Ancient Greek (oîkos)'settlement, house' and (sphaîra)'sphere'), is the worldwide sum of all ecosystems. It can also be termed the zone of life on the Earth. The biosphere (which is technically a spherical shell) is virtually a closed system with regard to matter, with minimal inputs and outputs.
HydrolysisHydrolysis (; from Ancient Greek hydro-'water' and lysis'to unbind') is any chemical reaction in which a molecule of water breaks one or more chemical bonds. The term is used broadly for substitution and elimination reactions in which water is the nucleophile. Biological hydrolysis is the cleavage of biomolecules where a water molecule is consumed to effect the separation of a larger molecule into component parts.
Organic compoundOrganic compounds are a subclass of chemical compounds of carbon. Little consensus exists among chemists on the exact definition of organic compound; the only universally accepted definition is the quasi-tautological "organic compounds are the subject matter of organic chemistry". Generally, any large chemical compound containing a carbon–hydrogen or carbon–carbon bond is accepted as an organic compound.
MonosaccharideMonosaccharides (from Greek: single, : sugar), also called simple sugars, are a class of organic compounds usually with the formula (CH2O)x. By definition they have two or more carbon-carbon bonds. More specifically, they are classified as polyhydroxy aldehydes or polyhydroxy ketones with the respective formulas H-[CHOH]n-CHO or H-[CHOH]m-CO-[CHOH]n-H respectively.
decompositionRelated word or term.spoilageRelated word or term.perishableRelated word or term.*As an Amazon Associate I earn from qualifying purchases.