(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

1. You pour 108 cm^3 of ethanol, at a temperature of - 10.0 C, into a graduated cylinder initially at 20.0 C, filling it to the very top. The cylinder is made of glass with a specific heat of 840 J/kgK and a coefficient of volume expansion of 1.2 × 10^-5 K^-1; its mass is 0.110 kg. The mass of the ethanol is 0.0873 kg. The specific heat capacity of ethanol is 2428 J/kgK and the coefficient of volume expansion of ethanol is 7.5 × 10-^5 K^-1.

(a) What will be the final temperature of the ethanol, once thermal equilibrium is reached?

(b) How much ethanol will overflow the cylinder before thermal equilibrium is reached?

2. Relevant equations

Q_e+Q_g=0

m_g c_g (T_f-T_gi )+m_e c_e (T_f-T_ei )=0

ΔV/V=βΔT

3. The attempt at a solution

Ive solved them - i really need someone to check them for me, i got - 0.892C for a which i think is right and 0.1cm^3 for b. I am really unsure of b. To solve b i found the expansion of the glass to be -2.71*〖10〗^(-8) m^3 and therefore the final volume to be 1.0797*〖10〗^(-4)m3 then i did the same for the ethanol which i got 7.38*〖10〗^(-8)m3 and 1.0807*〖10〗^(-4)m3 respectively..... from that i found V_loss=V_fe-V_fg and then i got the answer of 0.1 cm3........... any help is appreciated

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# Homework Help: Thermal Expansion of ethanol

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