chemistry / physics

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the specific heat capacity of seawater is 3900 j/kg degrees celcius. how much energy is needed to heat 500g of seawater from 20 degrees celcius to 90 degrees celcius?
if not i need to know how to work it out

  • chemistry / physics -

    energy=mass*specificheat*changeintemp
    = .5kg*3900j/kgC*(90-20)C

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