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H conversions

 

H = magnetic coercive force, AT/m

    = NI/L

     = Magn. Int.

      = A turns/m

      = field strength

      = magnetizing force (oersteds)

      = Amp turns/meter

      = magnetic intensity

H = Enthalpy

       = U + PV

       = E + PV

       = G + TS

       = - spontaneous

H = Heat (watt-seconds)

       = I2Rs

Ĥ = Hmean

ΔH = ΔU + PΔV (P,V work only)

      = ΔU + VΔP (P,V work only)

      = qP,V (P,V work only)

      = + endotherm.

      = - exotherm.

      = 0 (isotherm., Id. g., ΔU=0, expans., contract, mix)

      < 0 (ΔG<0, ΔS>0)

      = TīΔS (prohibitive T)

      = ΔG + TΔS (const P)

      < TΔS (ΔH>0, ΔS>0)

      < 0 (ΔS>0, any T)

      < 0 (ΔS<0, low T)

      > 0 (ΔS>0, high T)

      > 0 (ΔS<0, prohib., nonspontaneous)

      = TΔS (const. T,P, PV work only, equil.)

       = Σ Hprod - Σ Hreact

       = ΔU + ΔnRTgas

       = q

       = nΔĤ

       = ΔE + Δ(PV)

       = q - w + Popp(ΔV)

       = qP

       = ΔE + PoppΔV

       ≈ ΔE

       = -htRx/g (limit reactant)

       = nCpΔT

ΔH (298) ≈ TeqΔS (298)

ΔĤ = ΔE +ΔngasRT

ΔHθ = ΔGθ + TΔSθ (equil., st. cond.)

│ΔH│>│TΔS│ (ΔH<0, ΔS<0)

ΔH1 = A + B → C

ΔH2 = -D + E → C

ΔH3 = A + E → D

ΔĤ0F = amount of heat used or released in form. / mole/ 2980K /from elements

ΔHRx = n[ΔHvap + CPΔT] (liquid to gas)

ΔH0Rx = ΣProd.nΔĤ0F - ΣReac.nΔĤ0F

ΔH0Rx = ΔG0Rx + TΔS0Rx

ΔHsys = ΔGsys + TΔSsys

         = -TΔSsurr

ΔHvap = qrev. (P,V, work only, Tb)

         = TbΔŜvap (const. P) (ΔS = 21 cal./mol K   Trouton)

         ≈ 88 JTb/mol ∙ K (const. P)

ΔHtr = Ttr.ΔStr. (rev., equilibrium)

ΔĤtr = Ttr.ΔStr/n

        = qrev. tr./n

ΔĤvap =TΔŜvap

ΔĤmelt = TmeltΔŜmelt

H+ = hydrogen ion

[H+] = 10-pH

       = 1 ∙ 10-7 M (pH = 7)

       = ka([HX]/[X-]

       ka(ca/cb)

[H+]water = [OH-]

        = 1.00 ∙ 10-7 M @ 25 0C

        = 1.6218 ∙ 10-7 mol/L @ 3100K

h = altitude

h = Planck's constant

        = 6.6262 · 10-34 Js

        = E/ν

= ∆E

     = hc/λ

      = B.E. + 1/2mv2

- hν0 = VAsec.

H2O = 55.5247 mol/L @ 3100K

        = 18.0152 g/mol

H2O liquid = 0-100 0C

         = 32-212 0F

H2O ft3 ≈ 62.4 lbs

        = 22.4 L

H2O heat of fusion = 80 cal.

H2O heat of vaporization = 540 cal.

H2O density = 8.34 lb/gal

/H2O(dissoc.) = [OH-]/[H2O]

         = [H+]/[H2O]

hah-chee (Jap.) = eight

halb (G.) = half

half = 1/2

       = .5

       = hemi (Gr.)

       = demi (F.)

       = deuxieme (F.)

       = emisys, -eia, -y (Gr.)

       = halb (G.)

       = Halfte (G.)

       = misos (Gr.)

       = se (L.)

       = semi (L.)

Halfte (G.) = half

hand = 4"

haon-deug = eleven

Hct = hematocrit

          ≈ 45% total blood vol.

          = B-cell V/B-vol

Heat = random kinetic molecular energy of matter

       = q

       = Ht cap. ∙ T

       = Ω ∙ A2 ∙ s

Heatspecific = amount of heat required to raise temp. of 1 gram of a substance 1 0C

Heat Capacity = C

        = Heat/nT

hectare = ektarion (Greek)

         = 100 ares

         = ha

hectogram = 10 dekagrams

        = 100 g

        = hg

hectoliter = 10 dekaliters

        = 100 L

        = hl

hectometer = 10 decameters

        = 100 m

        = hm

height = aden

       = ard

helix = spiral

hematite = lodestone

hemi (Gr.) = half

hemina = pt (Eng)

       = 1/2 sextarius

hen (Gr.) = one

Henry = H

Hertz = Hz

hex (Gr.) = six

highest = akros

hin = 2 choas,

       = 2 conguises

       = 12 sextarii

hogshead = 2 barrels

        = hhd

horsepower = hp

hour = hora

        = day/24

        = 60 min.

hp = horsepower

        = 33,000 ft lb/min

        = 746 watt

        = (2P ∙ stroke ∙ A ∙ Rotation)/33,000

        = V ∙ eff ∙ I/746

hphr = .746 kwhr

Ht = heat

        = Ht. cap. ∙ T

        = Ω ∙ A2 ∙ s

HtRx = ht. absorb.sol'n + ht. absorb.cal.

HtT (Energy) = ΔT ∙ C

huit (F.) = eight

huitieme (F.) = eighth

humidityrelative = hum.absolute @ 0 0C/(Gms/m3) @  0C

        ≈ 100% - 10% /1 0C difference in wet and dry bulb reading

        ≈ 100% - 5% /1 0F difference in wet and dry bulb reading

hundert (G.) = hundred

hundred = centum (L.)

       = cent (F.)

       = centenus (L.)

       = hundert (G.)

       = ekaton (Gr.)

       = ekatontas (Gr.)

hundredth = one percent

        = centesima (L.)

        = centieme (F.)

        = ekatostos (Gr.)

hundredweight = 100 pounds

        = cwt

hydroxyl ion = OH-

hysteresis = amt magnetezation of ferrous mat.'l lags magnetizing force because of molecular friction

hysteresis loss = power expended in mag. mat'l as result of mag. hysteresis

      = Ph

Hz = Hertz

 

 

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