4000 J of heat energy is applied to a 70 g sample of water initially at 35oC. What is the final temperature of the sample? How much energy is required to heat 50g of water from 20oC to 80oC ? The specific heat capacity of water is 4.184 J/g*o C.

100 g of an unknown metal at 150o C was dropped in a bucket containing 50g of water initially at 21o C. The final temperature of the mixture was 32oC. What is the specific heat capacity of the unknown metal?

​​​​​​​Calculate the change in the internal energy of a system if 300 J of heat energy is added to it and if the system performs 200J of work

Determine the change in the internal energy of a system if 700 J of heat energy were removed from it and if 400 J of work was done on the system

1500 J of heat energy was added to a gas. The gas expands at a aconstant pressure of 45000 Pa from 0.02 m 3 to 0.05 m3.(a) How much work was performed by the gas or on the gas ? (b) Calculate the change in the internal energy of the system

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