Use the following information to anwser the next question: HNO3(aq) + KOH (aq) → KNO3 (aq) + H2O (l) A 50.0 mL sample of 0.200 mol/L nitric acid is mixed with 50.0 mL of KOH (aq), in a calorimeter. The initial temperature is 20°C. After the reaction, the temperature is 30°C. Calculate the molar enthalpy change for the above reaction.

The reaction between HCl and NaOH is represented below. When equal volumes of 1.00 M NaOH and 1.00 M HCl are mixed, 57.1 kJ of heat is released. What would A H be if 2.00 M HCI and 2.00 M NaOH is used instead of 1.00 M? HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l) AH = -57.1 kJ/mol... (A) - 28.6 kJ B-85.7 kJ (c) -57.1 kJ D - 114 kJ

In a constant-pressure calorimeter, 55.0 mL of 0.350 M Ba(OH), was added to 55.0 mL of 0.700 M HCI. The reaction caused the temperature of the solution to rise from 23.81 °C to 28.58 °C. If the solution has the same density and specific heat as water (1.00 g/mL and 4.184J/g °C.) respectively), what is AH for this reaction (per mole H₂O produced)? Assume that the total volume is the sum of the individual volumes. AH= kJ/mol H₂O

A 5.71 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee cup calorimeter. Before placing the sample in the water, the temperature of the salt and water is 23.72 °C. After the salt has completely dissolved, the temperature of the solution is 28.54 °C. What quantity in moles of the unknown salt were used in the reaction?

A 5.43 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee cup calorimeter. Before placing the sample in the water, the temperature of the salt and water is 23.72°C. After the salt has completely dissolved, the temperature of the solution is 28.54°C. If -3.13 x 10 J of heat was lost during the dissolution reaction of 0.0465 moles of the unknown salt, what is the enthalpy change (in kJ/mol of salt) for the dissolution reaction? Type here to search

50 g of solid sodium hydroxide is dissolved in 175 mL of water. Using a coffee-cup calorimeter, the temperature change of the water is measured to be -2.1°C.  Which equation best describes this system? NaOH(s)→NaOH(aq)  +  kJ                   NaOH(s)+ kJ →NaOH(aq)                                    NaOH(s)→NaOH(l) + kJ                 NaOH(aq)→NaOH(s) + kJ                     NaOH(aq)+ kJ →NaOH(s)                                NaOH(l)+ kJ → NaOH(s)   What is the definition of the temperature of a substance? the speed of the slowest particles in the substance, subtracted from the speed of the fastest particles.    the heat capacity of the substance times its mass    a measure of the average kinetic energy of a system the total heat content of a substance                     the speed of the fastest particles in the substance    Which statement describes an endothermic reaction? The surroundings warm up.      The system releases energy.   The potential energy of the products is less…

True or False: The test tube in which a chemical reaction is taking place feels warmer to the touch. The reaction is endothermic.

A 7.37 g sample of an unknown salt (MM = 116.82 g/mol) is dissolved in 150.00 g water in a coffee cup calorimeter. Before placing the sample in the water, the temperature of the salt and water is 23.72°C. After the salt has completely dissolved, the temperature of the solution is 28.54°C. What quantity in moles of the unknown salt were used in the reaction?