Chapter 1. Pre-lab Experiment 6: Calorimetry

Introduction

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1.1 Question 1

Consider the following hypothetical reactions

A + 2B → AB₂ DH = - XX kJ

2A + 5B → A₂B₅ DH = - XX kJ

Consider the following hypothetical reactions

A + 3B → AB₃ DH = - XX kJ

A + 4B → AB₄ DH = - XX kJ

Consider the following hypothetical reactions

A + B₂ → AB₂ DH = + XX kJ

4A + 5B₂ → 2A₂B₅ DH = - XX kJ

Question 2

Two solid objects, A and B, are both at room temperature and then placed in boiling water and allowed to come to temperature there. Each is then lifted out and placed in separate beakers containing 1000 g of water at 10.0 ^oC. Object A increases the water temperature by 1.50 ^oC; B also increases the water temperature by 1.50 ^oC. In neither case does a chemical reaction occur.

Two solid objects, A and B, are both at room temperature and then placed in boiling water and allowed to come to temperature there. Each is then lifted out and placed in separate beakers containing 1000 g of water at 10.0 ^oC. Object A increases the water temperature by 7.20 ^oC; B also increases the water temperature by 1.50 ^oC. In neither case does a chemical reaction occur.

Two solid objects, A and B, are both at room temperature and then placed in boiling water and allowed to come to temperature there. Each is then lifted out and placed in separate beakers containing 1000 g of water at 10.0 ^oC. Object A increases the water temperature by 1.20 ^oC; B also increases the water temperature by 6.50 ^oC. In neither case does a chemical reaction occur.

Question 3

The reaction between reactant A (smaller spheres) and reactant B (larger spheres) is shown in the diagram.

Question 4

Question 5