Determine the amount of heat (in kJ) associated with the production of 3.20×104 g of ammonia according to the following equation. N2(g) + 3H2(g) 2NH3 ΔH°rxn = −92.6 kJ Assume that the reaction takes place under standard-state conditions at 25°C. Enter your answer in scientific notation. ______ x 10____ kJ

Which of the following reactions corresponds to the thermochemical equation for thestandard enthalpy of formation of solid strontium nitrate?a. Sr2+(aq) + 2NO3–(aq) → Sr(NO3)2(s)b. Sr(OH)2(s) + 2HNO3(aq) → Sr(NO3)2(s) + 2H2O(l)c. Sr(s) + N2(g) + 3O2(g) → Sr(NO3)2(s)d. Sr(s) + 2HNO3(aq) → Sr(NO3)2(s) + H2(g)e. Sr(s) + 2N(g) + 6O(g) → Sr(NO3)2(s)

Two chemicals are mixed in a coffee cup calorimeter. The temperature of the solution in the coffee cup increases from 25 oC to 30 oC. This means the reaction of the two chemicals was________ and the q for that reaction would be ________

Given the balanced thermochemical reaction shown below,  assuming enough of both reactants are present, how many grams of H2O will be produced if 6,474 kJ of heat is produced?  Assume that the reaction goes to 100% completion.   2 C6H14 (g) + 19 O2 (g) →→ 12 CO2 (g) + 14 H2O (g)           \DeltaΔH = -7756 kJ   Report your answer to one decimal place with no units.  Do NOT use scientific notation.

If 106 kJ of heat are evolved when the reaction described below is carried out, the mass of HCI gas (36.46 g/mol) produced is 3 Cl₂(g) + PH3 (g) PCI 3 (g) + 3 HCI (g) AH = 570.4 kJ Report your answer to 3 sig figs. → 00 2:16 g.

Industrial production of nitric acid, which is used in many products including fertilizers and explosives, approaches 10 billion kg per year worldwide. The first step in its production is the exothermic oxidation of ammonia, represented by the following equation. 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g) ΔH⁰rxn = −902.0 kJ If this reaction is carried out using 7.000 ✕ 103 g NH3 as the limiting reactant, what is the change in enthalpy?

The temperature of a sample of aluminum increased by 23.5 °C when 257 J of heat was applied. What is the mass of the sample? m= g Substance lead silver copper iron aluminum Specific heat J/(g°C) 0.128 0.235 0.385 0.449 0.903

Calculate the energy required to heat 157.0 g of graphite from 4.3 °C to 13.8 °C. Assume the specific heat capacity of - 1 - 1 graphite under these conditions is 0.710 J•g K. Round your answer to 2 significant digits. alo Ar Dlo

The table lists the specific heat capacities of select substances. Substance Specific heat capacity (J/g °C) lead 0.128 silver 0.235 соpper 0.385 iron 0.449 aluminum 0.903 water 4.184 An unknown substance has a mass of 10.5 g. The temperature of the substance increases by 13.3 °C when 53.8 J of heat is added to the substance. What is the most likely identity of the substance? iron lead aluminum copper water silver O O C

Consider the thermochemical equation for the combustion of acetone (C3H₂O), the main ingredient in nail polish remover: C3H6O (1) + 4 O₂ (g) → 3 CO₂ (g) + 3 H₂O (g) ΔΗ° rxn = 1790 kJ If a bottle of nail polish remover contains 222 mL of acetone, what is the magnitude (the value) of heat released by the complete combustion of the acetone in the bottle? The density of acetone is 0.788 g/mL. The molar mass of acetone is 58.08 g/mol. The units are kJ. Do not include units in your answer.