1. A 5.88 kg piece of granite with a specific heat of 0.803 Jg-1 °C-1 and a temperature of 85.1 °C isplaced into 2.00 L of water at 19.0 °C. When the granite and watercome to the same temperature, what will the temperature be?
2. The combustion of methane (the chief component of naturalgas) follows the equation:
CH4(g) + 2O2(g) →CO2(g) + 2H2O(g)
∆H° for this reaction is -802.3 kJ. How many grams of methane mustbe burned to provide enough heat to raise the temperature of 202.3mL of water from 24.09 °C to 42.67 °C?
3. How much heat, in joules and in calories, must be removedfrom 1.58 mol of water to lower its temperature from 26.6 to14.1°C? Include the sign in your answer.
4. A vat of 4.07 kg of water underwent a decrease in temperaturefrom 61.38 to 58.44 °C. How much energy in kilojoules left thewater? Include the sign in your answer. (For this range oftemperature, use a value of 4.18 J·g-1·°C-1for the specific heat of water.)
