1. Calculate the change in total internal energy for a system that releases 2.38 × 104...

1. Calculate the change in total internal energy for a system that releases 2.38 × 10⁴ kJ of heat and does 6.80 × 10⁴ kJ of work on the surroundings. Enter your answer in scientific notation.

2. In a gas expansion, 69 J of heat is absorbed by the system, and the energy of the system decreases by 114 J.

Calculate the work done.

3. Be sure to answer all parts. Given the thermochemical equation for photosynthesis, 6H₂O(l) + 6CO₂(g) →C₆H₁₂O₆(s) + 6O₂(g) . ΔH = +2803 kJ/mol. Calculate the solar energy required to produce 8503 g of C₆H₁₂O₆.

4. In a constant-pressure calorimetry experiment, a reaction gives off 23.8 kJ of heat. The calorimeter contains 150 g of water, initially at 25.4 c. What is the final temperature of the water? The heat capacity of the calorimeter is negligibly small.

5. A piece of silver with a mass 4.10 ×10² g has a heat capacity of 97.2 J/° C. What is the specific heat of silver?

Expert Solution

5)

Given that mass of silver: 4100 g

Heat capacity: 97.2 J/°C

Specific heat capacity is the amount of heat required to raise the temperature of 1 g substance by 1°

Specific heat capacity = (97.2 J/°C)/4100 g

= 0.0237 J/g-°C

queen_honey_blossom answered 1 year ago

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