An ideal gas is compressed isothermally from 20 L to 10 L. During this process, 5 of work is done to compress the gas. What is the change of thermal energy for this gas? A-5J B. - 10J ©5J D 0J

Need asap please help

Help me solve both for my homework. Thank you!

3-Typical asphalt roofing shingles have a thermal conductivity of about 0.79 W/m-k. If the temperature inside the house is 75 F and the temperature outside is 5 F, find the heat flux (the rate of heat transfer divided by the surface area through which conduction occurs ) through a 2 cm thick asphalt shingle roof.

A spring-loaded piston-cylinder device contains 1.5 kg of carbon dioxide. This system is heated from 200 kPa and 25 °C to 1200 kPa and 300°C. Determine the total heat transfer to and work produced by this system.

1. A Rankine cycle with reheating has a throttle pressure of 135 bars at the turbine inlet and 28 bars reheat pressure, the throttle and reheat temperature of the steam is 550C, condenser pressure is 0.035 bar, mass flow rate of steam is 10 kg/sec. Draw the T-s and schematic diagram of the cycle and determine the following: (c) theoretical thermal efficiency (d) the steam rate (e) heat rate of the cycle

Steam at a pressure of 0.08 bar and a quality of 99.0% enters a shell-and-tube heat exchanger where it condenses on the outside of tubes through which cooling water flows, exiting as saturated liquid at 0.08 bar. The mass flow rate of the condensing steam is 5.8 x 105 kg/h. Cooling water enters the tubes at 15°C and exits at 35°C with negligible change in pressure. Neglecting stray heat transfer and ignoring kinetic and potential energy effects, determine the mass flow rate of the cooling water, in kg/h, for steady-state operation. mwater = i 568765.92 kg/h