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Chapter 5: Question 15 E (page 269)

Would the amount of heat measured for the reaction in example 5.5be greater, lesser, or remain the same if we used a calorimeter that was a poorer insulator than a coffee cup calorimeter? Explain your answer.

Short Answer

Expert verified

The amount of heat measured would be lesser if the calorimeter was replaced with a poorly insulated calorimeter.

Step by step solution

01

Change in temperature

The amount of heat measured inexample 5.5 is 2.89kJ.

If the calorimeter is poorly insulated, it will lose heat to its surroundings, decreasing the overall temperature of the reaction.Therefore, the change in temperature would also decrease.

02

Heat measured

The heat required to raise the temperature of a substance is given by the formula Q = C\( \times \)m\( \times \)\(\Delta \)T, where“C” is thespecific heat of the substance, “m” is the mass of the substance, and “∆T” is the change in the temperature of the substance.

Suppose the change in temperature decreases, and the heat measured for the reaction would also decrease. So, the heat measured for the reaction in example 5.5 would be less than 2.89kJ.

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Most popular questions from this chapter

From the molar heats of formation in Appendix G, determine how much heat is required to evaporate one mole of water:\({{\bf{H}}_{\bf{2}}}{\bf{O}}\left( {\bf{l}} \right) \to {{\bf{H}}_{\bf{2}}}{\bf{O}}\left( {\bf{g}} \right)\)

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