The amount of heat transferred to water is equal to the amount of heat that is lost by the piece of iron dropped to it. To solve for the quantity of the heat in either direction, we use the equation,
H = mcpdT
where H is heat, m is mass, cp is the specific gravity, and dT is the change in temperature. Substituting,
H = (200g)(0.444 J/g°C)(100°C - 22°C)
H = 6926.4 J
Thus, the heat lost by the piece of iron is approximately 6926.4 J.
The tectonic plates below earths surface shape earths landforms
Answer:
Scientists can discuss and compare very large numbers, which is useful because substances in everyday quantities contain very large numbers of atoms and molecules.
Explanation:
The density of an object is the ratio of its mass over the volume. This translates to the amount of substance present in a certain space and can mathematically be expressed as,
density = mass / volume
In this item, we are given that the object of mass 1.41 kg is able to displace 0.314 L of liquid. The volume of water displaced is also the volume of the object. Hence,
density = 1.41 kg / 0.314 L = 4.49 kg/L
Then, we convert the calculated volume of g/mL.
density = (4.49 kg/L)(1 L / 1000 mL)(1000 g/1 kg)
<em> density = 4.49 g/mL</em>