Question

ow much heat is needed to raise 50. g of aluminum from 20.0 °C to 100. °C? (Al sp. heat=0.215 cal/g°C)

Answer 1

To calculate the heat needed to raise the temperature of a substance, we can use the formula:

q = m * c * ΔT

Where:
- q is the heat needed (in calories)
- m is the mass of the substance (in grams)
- c is the specific heat capacity of the substance (in cal/g°C)
- ΔT is the change in temperature (in °C)

Given:
- m = 50. g
- c = 0.215 cal/g°C
- ΔT = 100. °C - 20. °C = 80. °C

We can plug in these values into the formula to find the heat needed:

q = 50. g * 0.215 cal/g°C * 80. °C
q = 860. cal

Therefore, 860 calories of heat are needed to raise 50. g of aluminum from 20.0 °C to 100. °C.