Class+Notes

__Calorimetry Mini Problem Set__! Here, you will nominate a scribe from each group who will write a description of how to find the solutions to problems 1-7. The answer itself is already on the little sheet.

Mass of Cu = 1kg (C= 0.385 kJ/kg °C) ΔT= 80 - 20 = 60 °C Q cu= (1kg)(0.385 kJ/kg °C)(60 °C)= 23.1 kJ Mass of water = 0.5 kg (C = 4.184 J/g °C) ΔT= 80 - 20 = 60 °C Q water= (0.5kg)(4.184 J/g °C)(60 °C) =125.5 kJ Q total= 125.5 + 23.1 = 148.6 KJ || Volume (water) = 0.500 cubic meters Specific Heat (water) = 4.18 J/g°C ΔT: 20 °C
 * Question Number || Descriptive Answer ||
 * 1 || Given:
 * 2 ||  ||
 * 3 ||  ||
 * 4 || Given:

Solution: 0.500 cubic meters = 0.5 * 1 cubic meter = 0.5 * (1 m * 1 m* 1 m) = 0.5 * (100 cm * 100 cm * 100 cm) = 0.5 * (1,000,000 cm) = 500,000 cubic centimeters

1 cubic centimeter = 1 gram

Mass (water) = 500,000 grams

q = m * C * ΔT q = 500,000 g * 4.18 J/g°C * 20 °C q = 41,800,000 J q = 41,800 kJ

41,800 kJ / (52.5 kJ/g) = 41,800 kJ * (1 g / 52.5 kJ) = **796 g** ||
 * 5 ||  ||
 * 6 ||  ||
 * 7 ||  ||