QUESTION 11 Which of the following is a statement of the principle of Hess's law? If...

QUESTION 11

Which of the following is a statement of the principle of Hess's law?

		If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the product of the enthalpy changes for the individual steps - that is the multiplication of the enthalpy changes for the individual reactions you have manipulated.
		The ΔH for a process in the forward direction is equal to the ΔH for the process in the reverse direction.
		The ΔH for a process in the forward direction is equal in magnitude and opposite in sign to the ΔH for the process in the reverse direction.
		If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the sum of the enthalpy changes for the individual steps - that is the addition of the enthalpy changes for the individual reactions you have manipulated.
		The ΔH of a reaction depends on the physical states of the reactants and products.

QUESTION 12

A coffee cup calorimeter is usually used for determining:

		the heat of combustion of gaseous reactions
		the molar heat capacity of pure elements
		the heat of reaction of aqueous reactions
		the calories in food samples
		the heat capacity of solid samples

Expert Solution

Answer for question 11 is

The prinicple of Hess's law is

If a reaction is carried out in a series of steps, the delta H for the reaction will equal to the sum of the enthalpy changes for the individual steps, that is the addition of the enthalpy changes for the inidvidual reactions you have manipulated.

Answer for question 12 is

A coffee cup calorimeter is usually used to determine the the heat of reaction of aqueous reactions.

queen_honey_blossom answered 2 years ago

Which of the following is a statement of Hess's law?

Which of the following is a statement of Hess's law? A) If a reaction is carried out in a series of steps, the AH for the reaction will equal the sum of the enthalpy changes for the individual steps. B) If a reaction is carried out in a series of steps, the AH for the reaction will equal the product of the enthalpy changes for the individual steps. C) The AH for a process in the forward direction is equal in magnitude and...

Give a statement of Hess's law.

Hess's Law to the following reactions: a) CaO (s) + 2HCl --> CaCl2 + H2O b...

Hess's Law to the following reactions: a) CaO (s) + 2HCl --> CaCl2 + H2O b Ca(OH)2 + 2HCl --> CaCl2 + 2H2O c) CaO (s) + H2O --> Ca(OH)2 Theoretically, which one is the correct relationship for the enthalpy changes of three reactions above? a) ΔHa = ΔHc - ΔHb b) ΔHa = ΔHc + ΔHb c) ΔHa = ΔHb - ΔHc d) ΔHa = 2ΔHb + ΔHc Also explain why the Hess's law applies here by using the...

Calculate the enthalpy of reaction for the following reaction using Hess's Law and the equations provided...

Calculate the enthalpy of reaction for the following reaction using Hess's Law and the equations provided below. Target Reaction: Sr(s)+C(graphite)+1 1/2 O2(g) -----> SrCO3(s) H(degrees)=? C(Graphite)+ O2(g)-----> CO2(g) H(degrees)= -349kJ Sr(s)+ 1/2 O2(G)-------> SrO(s) H(degrees)= -592kJ SrO(s)+CO2(g)-------> SrCo3(s) H(degrees)= -234kJ

Hess's law of heat summation states that when a chemical equation can be written as the...

Hess's law of heat summation states that when a chemical equation can be written as the sum of two or more steps, the enthalpy change for the overall equation is equivalent to the sum of the enthalpy changes for the individual steps. Basically, the enthalpy change for the entire chemical change is the same no matter how you go from a reactant to a product. The book describes finding the enthalpy change for the combustion of graphite to carbon monoxide...

Question 11 11-Which is of the following is the most basal group within Metazoa? Group of...

Question 11 11-Which is of the following is the most basal group within Metazoa? Group of answer choices 1-porifera 2-cnidaria 3-ctenophora 4-choanoflagellates Question 12 12-If you were told an organism is a pseudocoelomate, what else could you say with confidence about the animal? Group of answer choices 1-the animal is triploblastic 2-it could belong to the subphylum vertebrata 3-it does not belong within the Eumetazoa 4-it does not belong to the lophotrochozoa

1/ a/ Calculate the change in enthalpy of the reaction below using Hess's law. S (s)...

1/ a/ Calculate the change in enthalpy of the reaction below using Hess's law. S (s) + O2 (g) → SO2 (g) (1) 2 SO2 (g) + O2 (g) → 2 SO3 (g) ΔH = - 196 kJ (2) 2 S (s) + 3 O2 (g) → 2 SO3 (g) ΔH = - 790 kJ b/ Calculate the change in enthalpy of the reaction below using Hess's law. N2O4 (g) → 2NO2 (1) 2NO2 (g) → 2NO (g) + O2...

Question 1 Which of the following are variables that can be manipulated in a gas law...

Question 1 Which of the following are variables that can be manipulated in a gas law equation? (Choose all that apply) Group of answer choices number of moles temperature pressure mass Question 2 True or False. According to Charles’s Law, if you have a balloon inside a car at noon during a hot summer day, the molecules inside of the balloon will cause the volume of the balloon to increase. Group of answer choices True False Question 3 Name the...

11. Which of the following is a correct statement? A. The objective of short-term financial management...

11. Which of the following is a correct statement? A. The objective of short-term financial management is to maximize carrying costs. B. Managing short-term cash flows involves minimizing liquidity. C. In managing short-term finances, a financial manager should seek the optimal level of investment in fixed assets. D. A financial manager should use a cash budget to identify short-term financial needs. E. In an ideal economy, the optimal level of net working capital is positive. 12. A firm needs to...

QUESTION 11 Which of the following programs is paid for partly by the federal government and...

QUESTION 11 Which of the following programs is paid for partly by the federal government and partly by the states? Social security Medicaid Medicare All of the above

Question