Wednesday
April 16, 2014

Homework Help: Material Science

Posted by Joy on Saturday, August 24, 2013 at 10:22pm.

A polystyrene ice chest contains 3 kg of ice at 0 degrees Celsius. Triangle H for melting = 3.34 x 10 to the 5 power J/kg p = 1000 kg/m cubed, CP =4190 J/ (kg K). Heat transfer is limited by conduction (k=0.06W/m K)) from the outside wall at 30 degrees Celsius. This means that temperature within the ice chest is not a function of position. Assume the heat flux (J/(sec m squared) is the same through all walls: top, sides, bottom. The walls have thickness = 4 cm and total surface area = 2400 cm squared.

Suppose heat transfer is due to conduction through the wall and convection at the surface with h = 8W/ (m squared K) to ambient air at T infinity = 30 degrees Celsius.

Calculate heat flux (J/ (sec m squared) at the walls.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Material Science - A polystyrene ice chest contains 3 kg of ice at 0 degrees ...
Material Science - A polystyrene ice chest contains 3 kg of ice at 0 degrees ...
Material Science - A polystyrene ice chest contains 3 kg of ice at 0 degrees ...
physics - Ice of mass 11.0 kg at 0.00 C is placed in an ice chest. The ice ...
Physics - An ice chest at a beach party contains 12 cans of soda at 2.45 C. ...
Physics help!! - A Styrofoam bucket of negligible mass contains 1.60 kg of water...
Physics help!! - A Styrofoam bucket of negligible mass contains 1.60 kg of water...
Chemistry - H8P1: Polystyrene The monomer structure of polystyrene is shown ...
science - on a winter day the temperature drops from -15c too -25C overnight. if...
Science - On a winter day the temperature drops from 15C to 25C overnight. ...

Search
Members