Thermo Kin Lecture 7 Rev Probs

# Thermo Kin Lecture 7 Rev Probs - as a uniform mass with a...

This preview shows pages 1–3. Sign up to view the full content.

Sample Problem: Tinoco ch. 3 #27 The temperature of a typical laboratory freezer unit is -20°C. If liquid water in a completely filled, closed container is placed in the freezer, estimate the maximum pressure developed in the container at equilibrium. The enthalpy of fusion of water may be taken as 333.4 kJ/kg, independent of temperature and pressure and the densities of ice and liquid water at -20°C are 0.9172 and 1.00 g/cm 3 , respectively.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Fever Problem The basal rate of a “standard man” (150 lbs = 68 kg) is equal to 72 kcal/h. Heat losses occur due to radiation, evaporation, convetion, and conduction. If you bundle up and your body compensates when you’re sick, you can shut down many of these (except radiation). Let’s suppose that you can shut down all of the body’s mechanisms of heat loss (for the purpose of an upper limit estimation). Calculate the rate of fever rise, assuming that the body can be considered
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: as a uniform mass with a specific heat capacity of 0.86 cal/g/°C. Bioreactor Problem Consider a thermophilic bacterium that converts glucose into acetic acid by the overall reaction: C 6 H 12 O 6 (s) + 2 O 2 (g) Æ 2 CH 3 COOH (l) + 2 CO 2 (g) + 2 H2O (l) a) Calculate ∆ H° for this reaction at 80°C and 1 atm. b) Estimate ∆ G° for this reaction at 80°C and 1 atm. Is it spontaneous? c) If 80 g/L glucose is completely converted by this bacterium at 80°C and 1 atm in a fermentation bioreactor, what will be the rise in temperature of the fermentation broth (you can assume that physical properties of the broth are identical to those of water). Use data from tables A.5-7 in Tinoco. Other physical properties that may be useful: Cp (J/mol/°C) Mol Weight (g/mol) Acetic acid (l) 123.5 60 Glucose (s) 225 180 H 2 O (l) 75 18 O 2 (g) 29 32 CO 2 (g) 37 44...
View Full Document

## This note was uploaded on 12/01/2011 for the course BME 125:306 taught by Professor Berthiaume during the Spring '11 term at Rutgers.

### Page1 / 3

Thermo Kin Lecture 7 Rev Probs - as a uniform mass with a...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online