A crane is brought for the construction of the bridge over the running water and the structural elements of the bridge are placed with a crane. The iron barrier weighing 10 tons was heat treated and its temperature was raised up to 97 °C before being placed. An accident occurred during the hoist and the iron barrier fell into water at 7° C. When the iron barrier is removed from the water after a long time, it has been observed that its temperature is the same as the water. Calculate the entropy change in the iron barrier, the entropy change in water, and the entropy generation caused by these changes. For iron barrier, you can accept specific heat capacity as 0.45 kj / kg.K.

The American Burn Association states 3. You heat up an aluminum sphere of radius r, 1.27254 cm to 100 °C. You cool a 20.0 g copper ring to 0.00000 °C. The inner radius of the copper ring is r, 1.27000 cm. You then place the sphere on top of the ring and they are allowed to reach thermal equilibrium. Assume no heat loss to the surroundings. At the equilibrium temperature the sphere falls through the ring. (a) What is the thermal equilibrium temperature? (b) What was the amount of heat that was transferred between the ring and the sphere? (e) Which object lost the heat and which object gained the heat? (d) What is the mass of the aluminum sphere? Do not use the definition of density to solve for the mass. O

The number of kilocalories in food is determined by calorimetry techniques in which the food is burned and the amount of heat transfer is measured. How many kilocalories per gram are there in a 5.00-g peanut if the energy from burning it is transferred to 0.500 kg of water held in a 0.100-kg aluminum cup, causing a 54.9°C temperature increase?

Hi please help: A 255 g lead ball at a temperature of 81.8 degrees Celsius is placed in a light calorimeter containing 156 g of water at 22.3 degrees Celsius.  Find the equilibrium temperature of the system. Express answer using three significant figures.