An isothermal compression is done on 1.42 mol of an ideal monoatomic gas at 15.8°C in a diathermic balloon very slowly so that its final volume is half its initial volume. What is the heat of this process? Enter your answer in units of Joules to zero decimal places.

If you combine 240.0 mL240.0 mL of water at 25.00 ∘C and 110.0 mL of water at 95.00 ∘C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and the energy content of foods. In an experiment, a 0.6334 g sample of acetylsalicylic acid (C9H8O4) is burned completely in a bomb calorimeter. The calorimeter is surrounded by 1.100×103 g of water. During the combustion the temperature increases from 22.68 to 25.23 °C. The heat capacity of water is 4.184 J g-1°C-1. The heat capacity of the calorimeter was determined in a previous experiment to be 929.9 J/°C. Assuming that no energy is lost to the surroundings, calculate the molar heat of combustion of acetylsalicylic acid based on these data. C9H8O4(s) + 9O2(g) 4 H2O(l) + 9 CO2(g) + EnergyMolar Heat of Combustion =   how many kJ/mol

An electric heater supplies 43.3 joules of energy to 27.3-g sample of H2 gas originally at 27.6 °C. Compute the final temperature (in °C). i °C

When ammonia reacts with dinitrogen oxide gas (ΔHf° = 82.05 kJ/mol), liquid water and nitrogen gas are formed. How much heat is liberated or absorbed by the reaction that produces 355 mL of nitrogen gas at 25°C and 737 mm Hg?

A 102.8 g sample of a metal initially at 183.00C is placed in 35.0 ml of water initially at 25.0 0C. After reaching thermal equilibrium, the final temperature of the system is 58.80C. What is the identity of the metal? Assume no heat is lost to the surroundings.

1. The formation of gaseous phosphorus trichloride is shown below:   P4 (g) + 6 Cl2 (g) → 4 PCl3 (g)     ΔH = -1207 kJ/mol   If 4.30 kJ of heat are released as the formation reaction above proceeds, how many milliliters of gaseous phosphorus trichloride, measured at 35°C and 712 torr, will be produced?

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