12. The specific heat of copper is 0.385 J/g • °C. Which equation would you use to calculate the amount of heat needed to raise the temperature of 0.75 g of copper from 7°C to 29°C? (1 point)Q = 0.385 J/g • °C x (29°C – 7°C)
Q = 0.75 g x 0.385 J/g • °C x 29°C
Q = 0.75 g x 0.385 J/g • °C x 22°C
Q = 0.75 g x 0.385 J/g • °C x 7°C
the change in temp is 29-7 = 22
Only one of your choices has 22
hummmm
To calculate the amount of heat needed to raise the temperature of a substance, we can use the equation Q = m x c x ΔT, where Q is the heat, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.
In this case, we are given:
- The specific heat of copper is 0.385 J/g • °C.
- The mass of copper is 0.75 g.
- The change in temperature is from 7°C to 29°C.
Plugging these values into the equation, we get:
Q = (0.75 g) x (0.385 J/g • °C) x (29°C - 7°C)
Simplifying further:
Q = 0.75 g x 0.385 J/g • °C x 22°C
Therefore, the correct equation to calculate the amount of heat needed is:
Q = 0.75 g x 0.385 J/g • °C x 22°C.