En un restaurante una taza de café está a 100ºC para tenerlo listo para la venta, ya que se enfría al rato a la temperatura del lugar (20ºC), liberando 800 cal al ambiente. Si una persona acude al restaurante para tomarse un buen café para empezar su jornada y le comunican que esta frío y se lo van a calentar a 50ºC, ¿Qué cantidad de calor le proporciona la estufa para lograrlo?

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

When using the scientist method, which step comes last?

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.