Please only answer if you truly know the answer - I even have a tutor and I thin

Question

Please only answer if you truly know the answer - I even have a tutor and I think he just confuses me more - Still don't understand Chemistry but I need to pass this class with a C so I beg you to only answer these questions if you truly know the ANSWER - Thank you so much in advanced.. Also if you don't agree with my answers please tell me why.. Thank you...

What do the specific heats of materials like copper, aluminum, and concrete all have in common? When a 213.0 g sample of aluminum is raised in temperature from 22.0 degree C to 95.0 degree C, what amount of heat is produced? What is the mass of a piece of concrete that starts at 90.0 degree C, is immersed in a calorimeter with 350.0 g of water at 26.0 degree C, and causes the water to rise to a temperature of 33.0 degree C? How much energy would 58.0 g of ice require to completely melt? How much heat is evolved when a 35.0 g sample of copper increases from 25.0 degree C to 35.5 degree C? What functional group is often contained in organic explosives? What is the oxygen source in the unbalanced reaction of gunpowder, KNCo3(S) + C(S) + S(S) When TNT detonates, what happens to the carbon atoms? Why are liquids and solids relatively easy to compress? When energy is added to a gaseous system, what happens to the particles of that system?

Explanation / Answer

20) C correct, they have low specific heat

21) A 13,838J = 14,000 J correct

22) A correct

23) A correct

24) B 141 J -> 140J

25) A correct

26) A KNO3 (potasium nitrate has oxygen)

27) A - they burn and release a lot of heat

28) D - they are difficult to compress. Gasses are easy to compress.

29) D An increase in temperature causes the gas particles move more quickly and rapidly at a random motion.

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