1. A 5.88 kg piece of granite with a specific heat of 0.803 J g-1 Â°C-1...

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Chemistry

1. A 5.88 kg piece of granite with a specific heat of 0.803 Jg^-1 Â°C^-1 and a temperature of 85.1 Â°C isplaced into 2.00 L of water at 19.0 Â°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) â†’CO₂(g) + 2H₂O(g)

âˆ†HÂ° 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 Â°C to 42.67 Â°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 to14.1Â°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 Â°C. How much energy in kilojoules left thewater? Include the sign in your answer. (For this range oftemperature, use a value of 4.18 JÂ·g^-1Â·Â°C^-1for the specific heat of water.)

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4.4 Ratings (602 Votes)

1 Heat lost by Granite Heat gained by water Mass of granite specific heat of granite 851T Mass of water specific heat of waterT 19 T Equilibrium temperature reached by water and granite See Answer

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