# Problem: Part A Calculate the standard enthalpy change for the reaction 2A + B ⇌ 2C + 2D Use the following data:Substance ΔHf° (kJ/mol)A -235B -381C 197D -477Express your answer to three significant figures and include the appropriate units. Part B For the reaction given in Part A, how much heat is absorbed when 3.70 mol of A reacts? Express your answer to three significant figures and include the appropriate units.

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###### Problem Details

Part A Calculate the standard enthalpy change for the reaction 2A + B ⇌ 2C + 2D Use the following data:

Substance ΔHf° (kJ/mol)

A -235

B -381

C 197

D -477

Express your answer to three significant figures and include the appropriate units.

Part B For the reaction given in Part A, how much heat is absorbed when 3.70 mol of A reacts? Express your answer to three significant figures and include the appropriate units.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Enthalpy of Formation concept. You can view video lessons to learn Enthalpy of Formation. Or if you need more Enthalpy of Formation practice, you can also practice Enthalpy of Formation practice problems.

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Our tutors rated the difficulty ofPart A Calculate the standard enthalpy change for the reacti...as medium difficulty.

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Based on our data, we think this problem is relevant for Professor Catalano's class at UNR.