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8 August, 17:12

Calculate the energy required to heat 406.0mg of cyclohexane from 33.5°C to 38.9°C.

Assume the specific heat capacity of cyclohexane under these conditions is 1.85·J·g-1K-1. x

Be sure your answer has the correct number of significant digits.

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  1. 8 August, 18:30
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    We need 4.06 J to heat of 406.0 mg of cyclohexane

    Explanation:

    Step 1: Data given

    Mass of cyclohexane = 406.0 mg = 0.406 grams

    The initial temperature = 33.5 °C

    The final temperature = 38.9 °C

    The specific heat of cyclohexane = 1.85 J/g*K

    Step 2: Calculate the energy required to heat

    Q = m*c*ΔT

    ⇒ with m = the mass of cyclohexane = 0.406 grams

    ⇒ with c = the specific heat of cyclohexane = 1.85J/g*K

    ⇒ with ΔT = The change of temperature = T2 - T1 = 38.9 - 33.5 = 5.4

    Q = 0.406 g * 1.85J/g*K * 5.40

    Q = 4.06 J

    We need 4.06 J to heat of 406.0 mg of cyclohexane
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