[View the accompanying Lesson on Heat & Specific Heat Capacity here.]
Perform the following calculations, being sure to give the answer with the correct number of significant digits.
- A car with magnesium wheels is parked in the sun. If the temperature rises from 22°C to 35°C, how many MJ of heat does each 6.8 kg wheel absorb?
- Calculate the temperature change that occurs when 364 cal of heat are added to 1.39 kg of ethanol.
- An unknown metal is thought to be aluminum. When 6.11 cal of heat are added to 22.5 g of the metal, its temperature rises by 4.8°C. If aluminum’s specific heat is 0.903 J/g∙°C, is the metal aluminum?