it is from heat chapter

When 23.6 g of calcium chloride were dissolved in 300 mL of water in a calorimeter, the temperature of the water rose from 25.0 degree celsius to 38.7 degree celsius. What is the heat energy change...

Estimate the amount and value of “free” energy provided by two adults living in a house 14 hours a day over the six months of the heating season. Assume that both adults have a diet of 2000...

Tell whether the temperature of the part will ever reach or exceed 135F. Use discriminant of a quadratic equation to decide. Part 2: If machine is in operation for 90 minutes before turning off, how...

Sodium metal is sometimes used as a cooling agent in heat exchange units because of it's relatively high molar heat capacity of 28.2 J/mol C. what is the specific heat of sodium in J/g C?

When 25mL of 1.0M H2SO4 is added to 50mL of 1.0M NaOH at 25c in a calorimeter, the temperature of the aqueous solution increases to 33.9C. Assuming that the specific heat of the solution is 4.18J/g...

Tell whether the temperature of the part will ever reach or exceed 135F. Use discriminant of a quadratic equation to decide. Part 2: If machine is in operation for 90 minutes before turning off, how...

State Change: Liquid to Solid. Name: Freezing. Energy: Less. Particle Motion: Slower. Heat: Released.   State Change: Gas to Liquid.    State Change: Gas to Solid.   State...

If a person burns energy at the rate of 150 Watts, how much cool water (at 50o) is needed each hour to keep the person cool by evaporation (assume no heat is lost by conduction or radiation ?   The...

1.20 grams of Mg is burned producing MgO. The heat from the reaction is used to warm 500 grams  water at 5 degrees Celsius. Find the final temperature of the water.