Answer:
There will be a change of odor, color, temperature, and composition. These are all the changes assosiated with a chemical change.
The answer is A. Solids only
Answer: 20.7 kJ
Explanation:
According to first law of thermodynamics:
=Change in internal energy
q = heat absorbed or released
w = work done or by the system
w = work done on the system=
{Work is done on the system is positive as the final volume is lesser than initial volume}
w = 4.51 kcal = 
(1kcal = 4.184kJ)
q = +1.79 kJ {Heat absorbed by the system is positive}
Thus for a system that receives 1.79 kJ of heat from surroundings and has 4.51 kcal of work done on it at the same time is 20.7 kJ
Hey mate!
You stuck?
Sodium Hydroxide is a corrosive formula. It causes severe skin and eye burns and digestive tract burns. Dust or vapor from the formula is extremely irritating to the eyes and respiratory tract. The material reacts to water. Target organs of Sodium Hydroxide consists of Eyes, skin, lungs and the respiratory system.
Hope this helps! :)
