Calculate the mass, in kilograms, of a piece of copper that absorbed 19,550 calories of heat, which caused the temperature to rise 85 degrees celsius. c= 0.092 cal/g degrees celsius. use 2 significant figures.

2.5 kg

Concept being tested: Quantity of heat

We are given the following;

We are required to determine the mass of the piece of copper;

Q = m × c × ΔT

m = Q ÷ cΔT

   = 19,550 calories ÷ (0.092 cal/g°C × 85°C)

   = 2500 g

but; 1 kg = 1000 g

Thus, mass = 2.5 Kg

Hence, the mass of the copper piece is 2.5 kg

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answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

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