Answer:
Yes, you can detect the difference visually.
I believe it is a crystal, read it in a chemistry book over last summer so might be off
I’m preeeeetty sure that it’s A
The specific heat is 0.401 J/(g x C). The specific heat is the amount of heat of one unit mass of an object required to raise the temperature by one degree Celsius. The specific amount can be calculated using Cp = Q/(m x changes in T) formula, where Cp is the specific heat, Q is the amount of heat, m is the object's mass, and changes in T is the changes in temperature<span>.</span>
Answer:
1.63 kilo Joules of energy will be produced when 14.8 g of silver nitrate react.
Explanation:

Mass of silver nitrate = 14.8 g
Moles of silver nitrate = 
According to reaction, when 1 mole of silver nitrate reacts with 1 mole of calcium it gives 18.7 kJ of heat.
Then amount of heat released when 0.08706 moles of silver nitrate reacts :

1.63 kilo Joules of energy will be produced when 14.8 g of silver nitrate react.