Homework Help: chemistry

Posted by matt on Monday, June 22, 2009 at 5:43pm.

The heat capacity of object B is twice that of object A. Initially A is at 300 K and B is at 450 K. They are placed in thermal contact and the combination is isolated. The final temperature of both objects is:

chemistry - GK, Monday, June 22, 2009 at 7:40pm
Let the heat capacity of A = c. The heat capacity of B is 2c. Let the final temperature be T.
The heat lost by B when A and Be are placed together is: (2c)(450-T)
The heat gained by A is (c)(T-300).
Assuming the Law of conservation of Energy holds, and there are no heat losses (heat transferred elsewhere),
(2c)(450-T) = (c)(T-300)
Solve for T.
chemistry - GK, Monday, June 22, 2009 at 10:06pm
The basic relationships above are:

1. Heat transferred = (heat capacity)(temperature change), or
deltaH = C•(T2-T1)
( T1, T2 = initial and final temperatures )

2. Heat lost by B = Heat gained by A

Answer this Question

Related Questions

Physics - "The energy that is transferred as heat to or from the object ...
physics - You do a certain amount of work on an object initially at rest, and ...
physics - You do a certain amount of work on an object initially at rest, and ...
science - Object A and B both start at rest. They both accelerate at the same ...
physics - You do a certain amount of work on an object initially at rest, and ...
Specific heat - When 1500 joules of energy is lost from 0.12kg object the ...
Physics - A 5.00 g object moving to the right at +20.0 cm/s makes an elastic ...
Physics - Two objects of different mass start from rest, are pulled by the same ...
physic - please help me.A 5.00 g object moving to the right at +20.0 cm/s makes ...
physics - the object is traveling in a circle,which one of the statements are ...

For Further Reading

First Name:
School Subject:
Answer: