Hello!
The reaction Heat or ΔH corresponds to the interval A
Reaction Heat is defined as the net change in enthalpy in a chemical reaction. To measure Reaction Heat, the intermediate path doesn't matter, but only the initial and final states.
So, the interval that measures the difference between the initial and final states in this reaction is the interval A, and calculating the enthalpy difference between those two points will give the ΔH of reaction.
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Chloroform combines with acetone in the presence of potassium hydroxide to give chloretone, which is used as a sleep producing (hypnotic) drug.
Answer:
The mass of copper that was heated is 30 g
Explanation:
The formula for the heat supplied, ΔH is;
ΔH = m·c·Δt
Where:
ΔH = Heat supplied = 480 J
m = Mass of the copper sample = Required
c = Specific heat capacity of copper = 0.4 J/(g·°C)
Δt = Change in temperature = T₂ - T₁ = 60° - 20° = 40°C
T₁ = Initial temperature = 20°C
T₂ = Final temperature = 60°C
Therefore, plugging the values, we have;
480 = m×0.4×40
m = 480/(0.4 × 40) = 30 g
The mass of copper that was heated = 30 g.
