How much energy, in Joules, is needed to raise the temperature from 25.75°C to 33.16°C in a 2.66 kg block of each of the following materials? Nickel has a specific heat of 0.445 J/g·K, titanium has a specific heat of 0.522 J/g·K, and iron has a specific heat of 0.449 J/g·K.
Nickel: _______ J
Titanium: ________ J
Iron: _________J
yas queen
q = mass metal x specific heat metal x (Tfinal - Tinitial)
For nickel, sp. h. is 0.455 J/g*K
mass = 2.66 kg = 2660 g
q in joules = 2660 g x 0.455 x (33.16 - 25.75) = ?
Post your work if you get stuck.
I got the Nickel answer wrong, I have the wrong amount of sigfigs for Titanium (And i don't know why), and I got the right answer for Iron.
Equation I used for Nickel --> 2660 * 0.455* (33.16 - 25.75) = 8968 J (Which is wrong)
Equation I used for Titanium --> 2660 * 0.522 * (33.16 - 25.75) = 10288 J (Which has the wrong amount of sigfigs)
To find the amount of energy needed to raise the temperature of a substance, you can use the equation:
Q = m * c * ΔT
Where:
Q = Amount of energy (in joules)
m = Mass of the substance (in kilograms)
c = Specific heat capacity of the substance (in joules per gram per degree Celsius or J/g·°C)
ΔT = Change in temperature (in degrees Celsius)
In order to use the equation, you need to convert the specific heat capacity from J/g·°C to J/kg·°C.
To convert from J/g·°C to J/kg·°C, divide the specific heat capacity by 1000 because there are 1000 grams in a kilogram.
Now, let's calculate the amount of energy for each material.
For Nickel:
Mass = 2.66 kg
Specific heat capacity = 0.445 J/g·°C = 0.445/1000 J/kg·°C
Change in temperature (ΔT) = 33.16°C - 25.75°C
Plugging these values into the formula:
Q = m * c * ΔT
Q = 2.66 kg * (0.445/1000 J/kg·°C) * (33.16°C - 25.75°C)
Now you can calculate Q to find the energy needed in joules for nickel.