Thursday
September 18, 2014

Homework Help: Science

Posted by Debra on Sunday, October 23, 2011 at 12:56am.

1. How much heat energy is lost by 3 kg of water when it cools from 80 degrees C to 10 degrees C?

2. A 300 g piece of aluminum is heated from 30 degrees C to 150 degrees C. What amount of heat energy is absorbed?

3. Determine the temperature change in each of the following.
(a) 10 kg of water loses 232 kJ of heat energy.
(b) 500 g of copper gains 1.96 kJ of heat energy.

4. After 2 kg of mercury gained 2.52 x 10^4 J of heat energy, its final temperature was 130 degrees C. What was its initail temperature?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Physics 20 - 1. How much heat energy is required to change 500 grams of water at...
Science - How much energy is released when a 5600-g sample of water cools from ...
Physics - Please Help! I am having difficulties grasping these concepts. Explain...
AP Chemistry - A 500 g piece of metal at 60 degrees celsius is placed in 200g of...
Chemistry - Calculate the joules of energy involved when 11 grams of water at 10...
Lauren - The specific heat of water is at 4.184J/g * degree C. How much heat is ...
thermal energy - A hot 0.25-kg piece of iron is placed in a calorimeter ...
Science-Chemistry - A 5.00 g sample of Al pellets (specific heat = .89 J/g ...
chemistry - How much energy must be put into a system to raise 100 g of solid ...
chemistry - how much energy is released when a 5600-g sample of water cools ...

Search
Members