A system releases 115 kJ of heat while  104 kJ of work is done on the system. Calculate the change in internal energy (in kJ)

10 A student heats 84.17 mL of water to 95.27°C using a hot plate. The heated water is added to a calorimeter containing 73.92 mL of cold water. The water temperature in the calorimeter rises from 2.15°C to 37.48°C. The specific heat capacity of water is 4.184 J and the density of water is g. °C 1.00 mL Assuming that heat was transferred from the hot water to the cold water and the calorimeter, determine the heat capacity of the calorimeter. J Heat capacity of calorimeter = °C

Delta E for a system is 27kJ. If 175kJ of work was done on the system, how much heat was released?

Gasoline and ethanol can both be used as a fuel source in cars.  However, the potential chemical energy is not equal.  A fuel mixture uses 85% ethanol and 15% gasoline called E85.  Assume a car is rated at 28.0 miles/gallon using gasoline only at $3.50/gallon and 22.5 miles/gallon using E85 at $2.85/gallon.  How much would it cost for using each fuel to drive 500.0 miles?

A 0.491 kg sample of an unknown metal loses 4.08 kJ of heat. If the change in its temperature was 22.4°C, calculate the specific heat capacity of the J metal in units if g°C

Calculate ΔU of a gas for a process in which the gas absorbs 41 J of heat and does 8 J of work by expanding.

The air within a piston equipped with a cylinder absorbs 545 J of heat and expands from an initial volume of 0.10 L to a final volume of 0.83 L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston?         Express your answer in joules.

A balloon filled with gas is compressed under an external pressure of 3.0 atm from 4.0 L to 1.0 L. How much work (in Joules) is transferred during the compression? 1 Latm= 101.325J

In a certain process, 400 J of heat is added to a system and the system simultaneously does 100 J of work. The change in internal energy of the system is 500 J 400 J 300 J -100 J -300 J

Which statement is true of the internal energy of the system and its surroundings following a process in which AE sys = +25 kJ? The system loses 25 kJ of energy and the surroundings gain 25 kJ of energy. The system gains 25 kJ of energy and the surroundings lose 25 kJ of energy. The system and surroundings both lose 25 kJ of energy. The system and surroundings both gain 25 kJ of energy.