When 1.00 g of AgCl is formed by the reaction in a coffee cup calorimeter, the temperature of 20.0 g of water increases from 15.0 degrees celsius to 20.47 degrees celsius. Calculate  a) the amount of heat absorbed by the water b) delta H when one mole of AgCl is formed by this reaction

A 1.800-g sample of phenol (C6H4O2) was burned in a bomb calorimeter whose total heat capacity is 11.84 kJ/°C. The temperature of the calorimeter plus contents increased from 20.82 °C to 27.81 °C. What is the heat of combustion per gram of phenol?

A chemical reaction takes place in an open flask. The reaction releases 355 kJ of heat and does 25 kJ of work on the surroundings. Is the reaction endothermic or exothermic? Calculate ΔH for the reaction. Calculate ΔU for the reaction.

When a 3.00 g sample of RbBr is dissolved in water in a calorimeter that has a total heat capacity of 0.903 kJ⋅K−1, the temperature decreases by 0.440 K. Calculate the molar heat of solution of RbBr.

The temperature of a 15-g sample of lead metal increases from 22 °C to 37 °C upon the addition of 29.0 J of heat. The specific heat capacity of the lead is J/g-K.

Please answer question 20 part A

Copper has been used for thousands of years, either as a pure metal or in alloys. It is frequently used today in the production of wires and cables. Copper can be obtained through smelting or recycling. Determine the energy associated with each of these processes in order to recycle 1.40 mol Cu. The smelting of copper occurs by the balanced chemical equation: CuO(s) +CO(g) → Cu(s) +CO,(g) where AHtCuo is = - 155 kJ/mol. Assume the process of recycling copper is simplified to just the melting of the solid Cu starting at 25°C. The melting point of Cu is 1084.5°C with AH®fus = 13.0 kJ/mol and a molar heat capacity, CPCU = 24.5 J/mol:°C.

22. A 44.97−g sample of water at 72.2°C is added to a sample of water at 25.7°C in a constant-pressure calorimeter. If the final temperature of the combined water is 38.4°C and the heat capacity of the calorimeter is 26.3 J/°C, calculate the mass of the water originally in the calorimeter.

When a 0.740-g sample of trinitrotoluene (TNT), C,H,N,O, is burned in a bomb calorimeter, the temperature increases from 23.4 °C to 26.9 °C. The heat capacity of the calorimeter and its content is 3.35 kJ/°C. How much heat was produced by the combustion of the TNT sample? O 34.2 kJ O 11.7 kJ O 101.5 kJ

When a 6.00 g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity of 3.74 kJ · K¯¹, the temperature decreases by 0.400 K. Calculate the molar heat of solution of KSCN. ΔΗsoln = kJ/mol