Specific Heat Mass
1. The problem involves understanding the relationship between heat energy, specific heat, mass, and temperature change.
2. The specific heat capacity formula is given by $$Q = mc\Delta T$$ where:
- $Q$ is the heat energy in joules,
- $m$ is the mass in grams,
- $c$ is the specific heat capacity in j/g°C,
- $\Delta T$ is the temperature change in °C or K.
3. Given the specific heat $c = 0.902$ j/g°C, and heat energies $Q$ as 8500 J, 6000 J, and 80,000 J, and a temperature change $\Delta T = 7500$ K, we can find the mass $m$ for each case using:
$$m = \frac{Q}{c \Delta T}$$
4. Calculate mass for each heat energy:
- For $Q = 8500$ J:
$$m = \frac{8500}{0.902 \times 7500} = \frac{8500}{6765} \approx 1.256\text{ g}$$
- For $Q = 6000$ J:
$$m = \frac{6000}{0.902 \times 7500} = \frac{6000}{6765} \approx 0.887\text{ g}$$
- For $Q = 80,000$ J:
$$m = \frac{80000}{0.902 \times 7500} = \frac{80000}{6765} \approx 11.82\text{ g}$$
5. These calculations show the mass of aluminum that would absorb the given heat energy with a temperature change of 7500 K.
Final answers:
- Mass for 8500 J: approximately 1.256 g
- Mass for 6000 J: approximately 0.887 g
- Mass for 80,000 J: approximately 11.82 g