Answer:
A = 728J
Explanation:
Mass of substance = 30g
Specific capacity of copper = 0.385J/g°C
Initial temperature (T1) = 27°C
Final Temperature (T2) = 90°C
Heat energy (Q) = ?
Heat Energy (Q) = Mc∇T
Q = heat energy
M = mass of the substance
C = specific heat capacity of the substance
∇T = change in temperature of the substance = T2 - T1
Q = mc∇T
Q = mc×(T2 - T1)
Q = 30 × 0.385 × (90 - 27)
Q = 11.55 × 63
Q = 727.65J
The heat energy required to raise 30g of copper sample from 27°C to 90° is 728J
728J
The following data were obtained from the question:
Mass (M) = 30g.
specific heat capacity (C) = 0.385 J/gºC.
Initial temperature (T1) = 27ºC
Final temperature (T2) = 90ºC
Change in temperature (ΔT) = T2 – T1 = 90°C – 27 = 63°C
Heat (Q) =...?
The heat involved can be obtained as illustrated below:
Q = MCΔT
Q = 30 x 0.385 x 63
Q = 728J
Therefore the heat involved is 728J
magnesium chloride (no prefixes)
Hello.
The answer is: False
The current theory of the formation of our solar system is that the planets formed more or less in their present orbits and they were made balls of gas but they were never comets captured by the sun.
Have a nice day
Answer:B
