When a 130 G Sample of NaOH(s) Dissolves in 400

question 50

Multiple Choice

When a 13.0 g sample of NaOH(s) dissolves in 400.0 mL of water to produce 413.0 g of solution in a constant pressure calorimeter, the temperature of the water and reaction vessel changes from 22.6°C to 30.6°C. Assume that the specific heat capacity of the solution is 4.20 J/(g · °C) , and that the heat capacity of the reaction vessel is 1.00 J/°C. What is the molar enthalpy of solution of sodium hydroxide (40.00 g/mol) ?

• A) 34 kJ/mol
• B) 54 kJ/mol
• C) 17 kJ/mol
• D) 43 kJ/mol
• E) 14 kJ/mol

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Definitions:

Disengagement Theory

The view that declines in social interaction in older age are due to mutual withdrawal between older adults and society as they anticipate death.

Social Interaction

Entails the process by which individuals act and react in relation to others, influencing each other's behaviors and thoughts in a social context.

Disengagement Theory

A theory suggesting that aging naturally involves a gradual withdrawal from social roles and relationships, as a part of healthy adjustment to aging.

Withdrawing From Society

The act of pulling back or distancing oneself from the interactions and activities of a social group or community.