uppose we have a piece of a candy bar that has an initial mass of 28g.  If we ignite the piece of candy bar (literally burn it), and it increases the temperature of 341.42g of water from 18.11°C to 69.72°C, how many calories per gram of energy did the candy bar provide if the final mass of the marshmallow is 3.92?  Note: 1.00 cal = 4.184 J. Give your answer in units of cal/g.

The temperature of a 63 g sample of an unknown substance is raised from 28° C to 86° C when 390 calories of heat are added . What is the specific heat of the sample , in cal/g . C ? Enter your calculated value to the nearest .001 cal/g . C .

450g of water is heated in a pot from 22°C to 62°C. The water has a specific heat capacity of 4190 J/kg*K. What is the amount of thermal energy/heat transferred to the water to increase the temperature?

How do I calculate L?

A manufacture claims that a teakettle has an output of 5.2kw. A test is done by heating 1liter of water. The water is initially at room temperature 22C and in 3 min the water reaches the boiling point. What can be said about the manufacture claim.  I used equation P=Q/t and got q= 936kw/s. But this can't be it, I don't think. Can you help me through this problem?  Thank you for your time and help.

1.68 L of helium gas in a balloon at room temperature (25 °C) was put in an oven at 250 °C and allowed to come to thermal equilibrium with its new surroundings. a) Calculate AU, AH, w and q for the gas inside the balloon.

2.2 kg of ice (solid phase of water) at -10°C is heated under atmospheric pressure. Answer the following questions. Use the following values for your calculation. specific heat of ice: 2.1 kJ/(kg °C) specific heat of water: 4.2 kJ/(kg °C) specific heat of vapor: 2.0 kJ/(kg °C) latent heat of fusion: 334 kJ/kg latent heat of vaporization: 2260 kJ/kg How much heat is required to change the phase of the liquid water to vapor? How much heat is required to raise the temperature of vapor to 200°C?