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- What is the average kinetic energy (in kJ mol-1) of a hypothetical gas with molecular weight 31.2 g mol-1 at a temperature of 77.1 °C? Do not try to identify the gas. Express answer in 2 significant figures.Consider these reactions: Reaction 1: H 2 (g)+Cl 2 (g) longrightarrow 2HCl(g) Delta*H = - 184.6kJ Reaction 2: 2OF 2 (g) longrightarrow O_{2}(g) + 2F_{2}(g) Delta*H = - 49.4kJ Reaction 3: N 2 (g)+2O 2 (g) longrightarrow 2N*O_{2}(g) Delta*H = 66.4kJ Use Reaction 3. How much energy (in kJ) is absorbed when 142. L of nitrogen dioxide is created at STP? Round to the nearest whole number.an important flavor component of vanilla extract is vanillin C8H8O3 molar mass = 152.15 g/mol when vanillin burns in a bomb calorimeter with a heat capacity of 8.60 kJ/°C the temp increases from 25.97°C to 31.18°C. if the heat of combustion of vanillin is -3760 kJ/mol what mass of vanillin (in g) was combusted? answer to two decimal places
- 5.25 grams of baking soda (NaHCO3) and excess vinegar were combined (reaction below).NaHCO3 (s) + CH3COOH (aq) NaCH3COO (aq) + H2O (l) + CO2(g) a.How many moles of CO2gas areproduced? Hint: use mole ratio. b.Whatvolume of CO2gas is produced when the reaction takes place at1.12 atm, 22.85 °C? c.Instead of doing this reaction in an air-conditioned classroom, the same reaction is performed outside on a hot Indiana summer day at 32.22 °C. Will the volume of CO2gas produced increase, decrease, or stay the same?Explain your choice.Liquid menthonal (CH4O) which is used as a cooking fuel, burns with oxygen gas to produce the gases carbon dioxide and water. The reaction produces 363 kJ of heat per mole of methonol. a) write a balanced equation for the reaction includig the heat of the reaction b) is the reaction endothermic or exothermic? c) How many moles of O2 must react with 0.450 mole of CH4O? d) How many grams of CO2 are produced when 78.0 g of Ch4O reacts?Consider these reactions: Reaction 1: H2(g)+Cl2(g)⟶2HCl(g)ΔH=−184.6 kJ Reaction 2: 2OF2(g)⟶O2(g)+2 F2(g)ΔH=−49.4 kJ Reaction 3: N2(g)+2O2(g)⟶2NO2(g)ΔH=+66.4 kJ Use Reaction 3. How much energy (in kJ) is absorbed when 159. L of nitrogen dioxide is created at STP?
- A 27 g aluminum foil pan is used to roast vegetables. The pan is put into a cold oven at 22 oC . How much energy in cal is absorbed by the pan after cooking at 232 oC (450. oF) for 25 minutes?4. At 10°C and 1 atm, x L of O2 gas is required to react with 0.85 g of glucose, what is the value of x? The unbalanced reaction is shown below: C6H12O6 (s) + O2(g) → CO2(g) + H2O(l)an important flavor component of vanilla extract is vanillin C8H8O3 molar mass = 152.15 g/mol when vanillin burns in a bomb calorimeter with a heat capacity of 12.16 kJ/ celsius the temp increases from 24.56 celsius to 30.60 celsius. if the heat of combustion of vanillin is -3760 kJ/mol what mass of vanillin (in g) was combusted? answer to two decimal places
- 1. How many liters does 42.85 grams of C3H8 occupy at STP? 2. How much energy in kJ is released when 124.49 g of nickel react with an excess of phosphorus? 5 Ni + 2 P -> Ni5P2 △ H = 436 kJ/mol 3. How much titanium in grams is required to release 509.15 kJ of heat? Ti + 2 B -> TiB2 △ H = 316 kJ/molConsider the following balanced equation for the combustion of hydrazine: N2H4(l)+O2(g)-->N2(g)+2H2O(l), ΔH = -622.0 kJ/mol If 1823 kJ of heat are released what volume of N2 is produced at STP? Answer in LitersHow many moles of O2 (g) are needed to react completely with 52.0 L of CH4 (g) at STP to produce CO2 (g) and H2O(g)?Is this correct answer 4.64?
