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Enthalpy Change

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Enthalpy Change

Post  streeter on Mon Dec 05, 2011 1:00 am

How do i calculate enthalpy change if i take 2.3 g of NaOH and dissolve it in 50.0 mL of water. The initial temperature was 24.2 C and the final temperature after it was dissolved was 34.9 C. The specific heat capacity was 4.18 J/g degree C

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Re: Enthalpy Change

Post  grandvalleystate54 on Sun Dec 11, 2011 1:13 pm

streeter wrote:How do i calculate enthalpy change if i take 2.3 g of NaOH and dissolve it in 50.0 mL of water. The initial temperature was 24.2 C and the final temperature after it was dissolved was 34.9 C. The specific heat capacity was 4.18 J/g degree C

q = m x c x dt

First, find mass of product. Water is 50.0 g/mL so 2.3 + 50 = 52.3g

then find q
=(52.3)(4.18)(34.9-24.2)

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