Answer :
Answer:
Explanation:
Using dimensional analysis :
 kg  *   J / (kg C)   *  C  =  J Â
Now put in the numbers:
 2 kg  *  450 J/ (kg C)  *  ( 120 - 30) C = 81 000 J
Answer:
Explanation:
Using dimensional analysis :
 kg  *   J / (kg C)   *  C  =  J Â
Now put in the numbers:
 2 kg  *  450 J/ (kg C)  *  ( 120 - 30) C = 81 000 J